7mm rem mag ballistics chart 1000 yardsjennings inmate roster

With that bullet, drop at 1000 would be measured in yards. External ballistics covers everything that happens during a bullet's flight between the muzzle of the rifle, and the target. If your max is 400-yards and the deer is moving, perhaps stick to 200-yards. While the 7mm 168 grain VLD would only need 3100 fps at the muzzle to match that 2000 fps velocity at 1000 yards. Newlon blanks. Im running a 20 tube on a Bergara action. The 7 PRC has very slightly less case capacity than the 7mm Remington Magnum, but also has a twist rate and neck length capable of shooting much heavier bullets than are common in a 7 Mag. Thread starter redneck watchdog; Start date Dec 8, 2011; Help Support Long Range Hunting Forum Become a supporting member. Thanks, Jake. He is a well-known entrepreneur, having started many successful online brands, and lives in St George, Utah. Suggested 7mm Rem. Looking forward to more. The ballistic data below was calculated with a Hornady 180gr ELD-Match 7mm bullet fired at . Figure 3. This streamlined, long 0.284 bullet cuts through the atmosphere with minimal drag effect, thus retaining velocity and energy far downrange (as you can see from the graph). Now that hunting season is over would love to see some load testing out of your 20 inch barrel. The benefit was a hot shower and soft bed every night! Heres what he reported using a 175gr ELDX, Federal 215M primers, and Reloder26 powder. The recoil of the 7mm PRC produces 27.7 ft-lbs of energy at a recoil velocity of 14.1 fps. There is still quite a bit more case capacity left with Magpro (my guess would be you could go to 77 grains before it compresses), so that could be an option for max velocity, but youd be going through quite a bit more powder to get there. You did not compare this cartridge to the 7mm RUM? If you cant your rifle the same every time, you won't have a problem, but if you change your cant by tipping your scope just five degrees to the right, your point of impact in the standard system would be 16 inches right! The following is a 500 yard 7mm Rem Magnum ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 500 yd mark. Good flat trajectory and power make this cartridge a winner when hunting deer, mule deer, and other medium to large game. The 7mm Precision Rifle Cartridge is a long-action centerfire rifle cartridge designed to shoot 180 grain bullets at 2,950 fps. Figure 1. You have to find the right balance of weight and aerodynamics. In certain situations we may suggest the use of ballistic turrets and for most scope models we can have custom turrets cut according to your load data. Canting your rifle scope (tipping it left or right) can also cause significant left/right error. In the 1960's Remington created the 7mm Remington Magnum based of the 375 H&H cartridge design. The higher the number, the better down range velocity retention. personally I like the 338 luapa and the 6.5 creed, reasonable to shoot compared to a 50 bmg and they will get you out there where you want to be and dont skip on the glass , high quality glass and big power isnt cheap either. However, why was the 8mm Mauser left out of this comparison? Well, that would limit most hunting rifles to between 150 and 400-yards. If it performs like my 6.5 PRC and 300 PRC, Im guessing it will be a winner too. Let me know! I will likely switch to that bullet once it becomes available. It is intended for long-range shooting due to its ability to utilize high BC bullets, and is also uniquely suited for hunting large animals such as elk. But, you dont want to get too close to that minimum expansion velocity. Shooters will gravitate toward heavy-for-caliber high-BC bullets in the 7mm PRC. You may be able to use a heavier bullet and achieve more energy or a longer range with more velocity.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'backfire_tv-box-4','ezslot_6',175,'0','0'])};__ez_fad_position('div-gpt-ad-backfire_tv-box-4-0'); Since were talking about max distances, Id like to clarify something here. The challenge of loading for any of the PRC cartridges is the extremely tight tolerances. The bullet with the lowest expansion threshold is Nosler Accubond Long Range, which expands starting at 1300 fps. So youre telling me Springfield Armory is planning on making a 7 PRC Waypoint 2020 in 2023 ?!?!?! My $0.02, 6.5 creedmore, 7.82 warbird, 338 luapa, 7mm ultra mag comes to mind. Very well done. However, its pointless to attempt such shots if you dont optimize 7mm Rem Mags point blank range during sighting-in. Surprisingly, I found your keywords ranking number 1 on Google! I enjoy your videos. I think Hornady just hit another home run with this one. I was finally able to connect on a billy at 575 yards, but with a quartering 15 mph wind. Policy. Ive constructed a similar table that takes into account bullet construction, including expansion ratios and weight retention over time, and Id be curious to get your opinion on it. Due to the extremely tight tolerances of these cartridges, Ive seen MANY manufacturers struggle with delivering barrels that spike pressures or have brass that doesnt fit right. Compare ballistics data on your favorite Winchester Ammunition rounds. I did chamber a 7mm Blaser some years back, the 7mm PRC seems to me a very much balanced cartridge coming from the 78gn capacity and based on the Ruger cartridge, look to be efficient for loading 160gn bullets to 2900-3000ft/s. Im tired of hunting with my long and heavy 300 win mag so Im re-chambering it. 7mm Ballistics Examined For this ballistics demonstration we are using Norma 150gr Scirocco with a muzzle velocity of 3117fps and a ballistic coefficient of 0.536. Matt. Im a big fan of the channel and look forward to more on the 7mm PRC. Worked up load with 195 bergers. I actually found RCBS to have the dies. Again, BC and velocity is important. We all understand how gravity works, and with the additional corrections for atmospheric conditions, a bullet's drop is easily calculated. Can someone help me with a MOA ( 4 clicks for 1" ) drop chart for my 7MM Rem Mag? Its an incredibly popular cartridge, but over time, I expect the 7 PRC to overtake it.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'backfire_tv-box-4','ezslot_7',175,'0','0'])};__ez_fad_position('div-gpt-ad-backfire_tv-box-4-0');if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'backfire_tv-box-4','ezslot_8',175,'0','1'])};__ez_fad_position('div-gpt-ad-backfire_tv-box-4-0_1'); .box-4-multi-175{border:none !important;display:block !important;float:none !important;line-height:0px;margin-bottom:15px !important;margin-left:auto !important;margin-right:auto !important;margin-top:15px !important;max-width:100% !important;min-height:250px;min-width:250px;padding:0;text-align:center !important;}. The highest being the 180 grain 7mm. Decreasing wind deflection is a very important part of precise long range shooting. This free bore acts as a gas expansion chamber, maximizing velocity due to a longer pressure curve. The bullets BC (ballistic coefficient) is very high at 0.536. I was hoping to optimize the cartridge . This means that velocity is the big player effecting how much a bullet will drop. ShootersCalculator.com is in the process of being massively overhauled. Use a small level, and look closely at new rangefinders that incorporate incline shooting compensation. I think all the powders you have tried except H4831SC are too slow. I personally worked up my load using the 150gr Hornady CX bullet, but now Hornady has announced a new 160gr CX bullet with a much higher BC and only one band instead of the two bands on the 150gr CX. With the Gunwerks Ballistic Turret dial to 575 yards, he held right on.For long range shooting, there are two very evident factors that affect the bullet's flight. Load Swift's 150-grain Scirocco at 3,036 fps delivers outstanding terminal performance. In a trophy hunting situation, it's important to have the equipment and preparation to ensure that you can make the shot at that once-in-a-lifetime trophy, even at 800 yards! Thankyou for report off the 7mm PRC as I have been searching for since I saw the SAAMI specification. The heavy-for-caliber VLD bullet's are the only readily available high BC bullet's that have been documented to ethically perform at long ranges on game animals, and the BC range on those bullet's ranges from 0.550 to 0.685. Think of it as a modernized 7mm Rem Mag. Great cartridge. The 7mm Rem. Though the sub-quarter MOA precision and low ES and SD are not guaranteed, they are the norm. Starline Brass has plans to produce these cases in the future. Little things that you may never have noticed can make a shot fail if you are really pushing the limits. This setup is for long range target shooting. Your email address will not be published. While the 7mm 168 grain VLD would only need 3100 fps at the muzzle to match that 2000 fps velocity at 1000 yards. Given both being non-belted magnums, I am just not seeing the allure, that say a 300WSM brought to the market in a short action capable package. Theres always another hunt. I am kind of waiting to find some Hornady brass to work up my official load. We don't need to do math, we'll just use one of the many ballistics programs that are availableif you are interested, try the free online program I put together atwww.gseven.com. Hey Jim, thanks for all the great content. The best of us always leave too soon. In addition to expanding reliably, a bullet must carry sufficient energy to take down the animal. 7mm Remington Magnum Despite its age, the 7mm Rem Mag's ballistics perform well even by today's standards. Note that with these loads, I switch to a standard large rifle primernot a magnum primer. The following table compares the 7 PRC to several other cartridges using Hornadys Precision Hunter line of ammunition. if you looking at 1000 yards I would be looking at a different rifle , Something more like a 50 BMG , 6.5 to be honest. What is the mounting method, QD or threaded? Looking forward to seeing what the 7mm PRC can do by comparison. Very impressive ballistics. The same goes for doping wind for direction and speed. How does the 7mm Rem Mag achieve such ballistics? We can minimize the effects from Magnus and Corriolis for sub 1000 yard shooting by zeroing at a longer range like 800 yardswhile pointing north or south. Thanks! We've measured the reference system to be on the order of eight inches at 1000 yards, but because of its exponential dependency on time of flight the 1500 yard drift could be as much as five feet! I used CCI large magnum rifle primers, and lovingly caressed each bullet before sending it on the ride of its life. So far, my favorite powder for reloading the 7 PRC is H4831SC using standard large rifle primers. Im gonna leave it right here, I own a lot of rifles but if I didnt there are 3 rifles that I could own and cover every game animal in north america. The first is simple to measure and compensate for. rating at 4,200 fps, it would miss. It will a produce a line graph showing the bullet drop and flight path of the bullet. Better to pass on a questionable shot. Mag. I hope brass makers continue to make 7mm STW brass. Ill keep pushing my 7RM 180gr at 3050 with 72.2gr Retumbo with brass more available than I could ever want or need. Based on the 7mm PRC data you shared, would you use the 7mm PRC for elk and large North American game? How far can you throw a ping pong ball compaired to to throwing a golf ball?? I mentioned that a bullet may not perform well under 2,000 fps. The Bigger Question is, whats YOUR maximum? Steve, Jim, Im in the middle of building a 7PRC. Your load data is tied to your rifle serial number and thus can be ordered from us at any time. This is using CCI Large Magnum primers, and shooting out of a 24 test barrel. Its just another very similar round with no clear huge advantages, maybe only recoil. Ballistic Programing/Custom Turrets:If you are buying a ballistic range finder or kestrel we will program the ballistic computer for you so everything is ready upon arrival. Pinsoft Software. Be cautious when rebarreling a rifle into any of the PRC cartridges. Thats exactly what the 7PRC is, but it is by no means the only cartridge that offers those specs. This 7mm Remington Magnum ballistics chart shows 140 grain Trophy Copper rounds with a 100 yard zero: This 7mm Rem Magnum ballistic chart shows 175 grain Fusion Rifle rounds with a 100 yard zero: Remington: This 7mm Rem Mag ballistic table shows 175 grain Core-Lokt rounds with a 100 yard zero: Shoot! Im not talking about self-doubt or simply asking yourself what if I miss. They use Berger 168 gr VLD (Very Low Drag) bullets. That sounds really cool. The 7mm PRC is a new round designed for long-range shooting and big-game hunting. I think too many hunters see muzzle velocity and assume if its fast, itll work long range, and thats not true at all. These are Altitude (basically, Pressure), and Air Temperature. Still a cool round for someone first using a .284 round. 7 PRC is designed for shorter barrels. [emailprotected]. But wait, there's more. Your email address will not be published. Do you plan to hit every animal with a rangefinder? Just like shooting near dawn or dusk, or shooting into a glare. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It's like these other guys said, if you throw a small rock it goes really fast, but not very far. Max range 600yard, would like to shoot the 180s. Would also mention- at THAT range, your ability to "read the wind" becomes critical. In general, a bullets maximum effective range is the distance at which it no longer travels fast enough to reliably expand when it hits a target. If you would like more information about any of these topics in an easy to understand format, try Robert Rinker's Understanding Firearm Ballistics. Commissions are earned for links to Brownell's, Amazon, MidwayUSA, GoHunt, OpticsPlanet, Sportsman's Warehouse, and other retailers. Ballistic Profile Specifications: Scope height, velocity, twist rate, and all ballistic data to include bullet Ballistic Coefficient (BC), powder charge, Base to Ogive, and Cartridge Overall Length will be provided with the package. Use this ballistic calculator in order to calculate the flight path of a bullet given the shooting parameters that meet your conditions. As an Amazon Associate I earn from qualifying purchases. Thanks, God Bless. Your rifle will be sent over to Evolved Munitions LLC who will then begin the load development process. Ive been curious how it would shake out/compare to the 7SAUM when seated long. Not all bullets are Max-Range bullets. Recommendation: The 7mm is recommended for military applications out to 1000+ meters. Did you perhaps mean 50 cm? I see yours has a suppressor. Again we see how important a short time of flight is to minimize these effects. Jim, Im wondering why you did not include the Winchester 284, in your comparative with the lineup. This load has been optimized in Shoot! che velocit riesci ad avere? Can you tell me which suppressor you are using? What are the speeds youre getting with your 20 barrel? So, the crosswind velocity and the bullet's time of flight will determine how much it is deflected in the wind. I find your data a bit too limited, which can vary greatly depending on multiple other factors. Seems like the 7 PRC is 90% of the 28 Nosler without the extremely short barrel life and 20% less recoil. He has managed multiple gun ranges, and has hunted around the world. Youtube is full of those videos. Look up bergerbullets.com. 5/8 to 1 groups at 500 yards. The only other company Ive seen with die sets is Whidden Gunworks. Barrel Break In: All barrels will increase in speed. The 30 caliber 165 grain Barnes TSX would have to be fired at 4100 fps muzzle velocity to maintain 2000 fps velocity at 1000 yards. Just wondering. .460 Steyr .416 Barrett .408 Cheytac .375 Chetac etc. Skyking; Oct 18, 2010; Replies 10 Views 8K. A good laser rangefinder is a tool, and if it isn't used properly it won't yield good results. Outdoor Hub, LLC (d/b/a Carbon Media Group), 30800 Telegraph Rd, Suite 1921, Bingham Farms, MI 48025 USA. I really do like what you and your contributing crew are doing. I have been saying for years a lot of the 2.5 inch cases would have been better off reduced to 2.250 2.3 inch .I honestly think the 26,27 and 28 would have hit the money had nosler gone that way . But I have heard it can be a 1K gun. I have a complete article on the best rifles available now in 7mm PRC. same principal applies to bullets. Nice informative article. Seems like they are trying to reinvent the wheel given that the 7mm STW (strangely missing from this article for comparisons) does everything the 7mm PRC does and more for over 40 years: 180gr in the 3000-3200fps range. That adds up to a difference of point of impact between shooting east and west of nearly seven inches. Magnus spin drift will cause a bullet to drift right for a right hand twist barrel, and the amount is proportional to the square of the time of flight. Being derived from the H&H case, there is plenty of case capacity, and the 7mm Remington Magnum will send the heavy 175-grain bullets at a muzzle velocity of 2800 fps or so, depending on the manufacturer, and the speed only increases as the bullets get lighter. Using this as a reference, let's examine several other factors that can effect our shot placement. But, I shoot a 195 EOL with a 1:9.5 twist out of a weatherby vanguard 7mm Rem Mag. Shots near the max effective range can totally miss the animal if you misjudge the distance by 50-yards. Though it is designed to headspace off the belt of brass, handloaders can improve concentricity by using the shoulder for headspacing. In other words what barrel length will produce a 3,000 fps muzzle velocity using the factory loaded Precision Hunter 175 gr ELD-X bullet? How do you think it will shoot the Barnes 168 gn LRX in case this new lead ammo ban goes through? 1400 W Henry St Snow. Surprisingly, the factory ammunition for the 160gr CX bullet offers the same 3,000fps muzzle velocity as the 175gr ELD-X bullet. I want this to be the best ballistic trajectory calculator out there. Sorry man, wasn't going after anyone, it's a hotly contested issue around the guys I run with, guess i just assumed it would be here too. In fact, Id guess that 60% of the new hunting rifles in most gun stores today are chambered in a cartridge designed by Hornady. We use cookies to provide you a better user experience. They have some cool videos that explain it better than I can. Let's look at the difference in drop and deflection for our reference at 1000 yards from a 200 yard zero for two cases: 1000 ft 50 degrees ,and 8000 ft and 20 degrees. In fact, Aaron Davidson, CEO of Gunwerks, jokingly said that the new 7PRC is the 7LRM. Ideal extreme powders? I feel it will offer the best velocity in a shorter barrel. Rifles, Bullets, Barrels & Ballistics . If you're targeting large and dangerous game, those heavier bullets certainly make a difference. If you throw a big rock, it puts a big hole in the ground, but doesn't go so far. burning 61 grains Reloder 22 Recoil: 26.5 ft-lbs at 14.6 fps velocity Muzzle Energy: 3,269 ft-lbs Maximum Pressure: 61,000 psi MPBR: 365 yards (Zero at 307 yards, 3.9" high at 100 yards) These are some impressive numbers. I really enjoy every bit from Income School! PBB will just thread the end in a typical 5/824 pattern and then youll use a direct thread suppressor like a Dead Air Nomad. Awesome article and information. Thanks. It would have been nice had you included the bullet used, bullet weight and muzzle velocites, because as we both know these vary a great deal. Seldom is the practical max the same as the true max distance. Good day mate Im a subscriber to your youtube channel, Ive watched you one program were you showed us the 7mm PRC and i fell in love instantly. What we have here is failure- to communicate. Youre right. .300 Weatherby Magnum, .300 Remington Short Action Ultra Magnum, .444 Marlin, .327 Federal Magnum, .500-465 Nitro Express, 7mm Winchester Short Magnum (WSM), 6.53mm (.257) Lazzeroni Scramjet, 9.3x74R, .307 Winchester, .375 Weatherby Magnum, .577 Nitro Express 3-Inch, .44 Remington Magnum (Rifle Data), .416 Dakota, 10mm Auto, .375 Winchester. Apr 17, 2011. load. Simple as that. This can be useful in comparing cartridges or loads. I think the biggest win for the PRC however is the factory support that the SAUM lacks. He has managed multiple gun ranges, and has hunted around the world. If its a can that takes a threaded muzzle device or a QD mount then who installed the device and did you time it for minimal POI shift? For example, most of the all-copper expanding bullets need something like 1,900 0r 2,000 fps to expand even a little. This September I was able to hunt mountain goats with Beaver Foot Outfitters in British Columbia. The parent case is the .300 Remington Ultra Magnum and fits a .284 inch bullet on a .317 inch neck with a beltless, rebated, bottleneck with a large rifle magnum primer case . grazie, Hi Jim, I hunt in the Alps area in Italy, I walk a lot and would like a light weapon. Copyright 2023 ShootersCalculator.comALL rights reserved. If you check Hornadys load data it shows N560 for every bullet except the 190. I have one on order with Preferred Barrels. Was nice to see your wife in the last video. Ive got a Remington Sendero with a Brux 1:9 twist. Hopefully with its introduction it will make SAUM brass easier to find because more people will go for the PRC moving forward. Im hunting with this cartridge with 145 gr TTSX on red stags till 250 kg untill 300 m: Part of that preparation is understanding, in simple terms, the external ballistics of a typical long range shot. I apologize for the misunderstanding. Was pleasantly surprised by your reference to preferred barrels and to find out that you are also a local Utah sportsman as I grew up only 70 miles away from St. George and still live and hunt this area with my family. I have a table showing the highest BC 7mm bullets, but here are a few bullets likely to be popular in the 7mm PRC: Below are the specified twist rates for many similar cartridges to the 7 PRC. Centerfire Handgun. But with a TBAC 7 ultra on a Fierce CT rival. I highly recommend Preferred Barrel Blanks for this job. ballistics software below for the same load: At 500 yards the remaining velocity is 2264fps again, this is exceptional ballistics for a bullet weight in this class and diameter. A good marksman will not squeeze the trigger unless he believes it will work. Ok ya that makes sense. Sedalia, MO 65301 Im a big fan of the 7mm. I have two bags of W-W virgin brass and enough multi-fired brass to last me the rest of my life. Great info on load data. Looking at your H4831sc chart Im a little faster at 62.7grs than what you had at 63grs. A faster twist in the rifling of a barrel allows the bullet to spin more quickly to stabilize longer (and consequently heavier) bullets. Increasing the BC to 0.700 the drift is only half, at 20 inches! Hornady officially announced the cartridge on October 26, 2022 at the NASGW Expo. .270 Winchester Short Magnum, .30 M1 Carbine, .300 H&H Magnum, .25-06 Remington, .284 Winchester, .224 Weatherby Magnum, 7x57mm Mauser, .250 Savage, .405 Winchester, .45 Colt (often called .45 Long Colt), .375 Dakota, .375 Remington Ultra Magnum, 6.5mm Remington Magnum, .500 Smith & Wesson Special, .375 Holland & Holland Magnum. Hi Jim, Quanto pesa il sistema che hai realizzato? There would be 226 inches drop at 1000 ft elevation compared to 207 inches at 8000 ft; and 52 inches deflection versus 40. Agreed that Whidden Gunworks makes the best reloading dies available. Backfires Youtube channel was the first publication to break the story of the cartridges SAAMI approval, and Backfire was also the first group to build a 7mm PRC and show it to the public. Oh, it would be close, but it would still fall under the precise point of aim by about an inch. I was pleasantly surprised to see that the cartridge is quite mild. In the past too much attention was placed on increasing MV, but modern long range shooters realize that increasing the BC increases performance without increasing recoil. 2023 Backfire LLC, a limited liability company headquartered in Utah, USA. I would like to know if you have any info on the 7.7 jap. Keep in mind this is an approximation and although it is quite accurate it should never replace first-hand experience of shooting your specific firearm and ammunition to determine the bullet drop and windage at different ranges and conditions. The Hornady 7 PRC is a new long-range hunting and competition cartridge that slides neatly into the gap that exists between the 6.5 PRC and 300 PRC. Required fields are marked *. Hornady has an incredible track record with cartridges over the last 20 years: 6.5 Creedmoor, 6.5 PRC, 300 PRC, 17HMR. And were you making your own brass or using RCC machined brass? Its important to educate yourself about 7mm Rem Mag Ballistics, especially for long range shots, because not knowing how your 7mm rem mag load performs at extended ranges could easily result in a miss. The bullet does not drop below the speed within the max range specified. These cartridges all drop less than 255 at 1,000 yards. This bullet has massive power, and a really flat trajectory allowing this bullet to hit targets much further away and with more power. This round is here to stay, and while the relative recoil or kick is often sighted as negative, it's often over stated, while it does kick the numbers show that the recoil on average is = or less than the average for the 30-06 but is of course more than the 270, and the 30-30. To make it as accurate as possible, it is important that you input the most accurate information that represents shooting conditions, your firearm, and cartridge. The 7mm Weatherby! But keep in mind she kicks more than the .308 and is harder on barrels, but is a nice compromise between the 308 and 300 Win Mag. 7mm Remington Magnum ~ 150 Grain ~ Trajectory Chart Trajectory for Custom .284 7mm Mag Ammo #4550 at 3000 Feet per Second At an Elevation Angle of: 0 degrees Ballistic Coefficients of: 0.545 0.515 0.515 0.515 0.515 Velocity Boundaries (Feet per Second) of: 2200 2200 2200 2200 Any idea on predicted velocities for it? If you own a 7mm Rem Mag, its easy to produce 7mm Rem Mag Ballistics reports using Shoot! Using dies from Whidden, I got to work. Thats one flat shooting load considering we sighted-in the bullet to impact only 2.37 inches high at 100 yards. I do have a gain lands so its not a 100% apples to apples comparison. Next, I loaded H1000. While I was thinking that the 7 prc might be the way to go, Im just going to re-barrel my 7mm weather with a faster twist! What barrel length has Hornady created the 7mm PRC for? Any recommendations Cartridge Type: Rifle Height: 2.85" Width: 0.534" Average FPS: 3121 Average Energy: 3330 Average Gr: 154 Recoil: 2.13 Power Rank: 4.81 of 20 . The parent case is the .308 Winchester with a narrowed neck that fits a .284 inch bullet on a .315 inch neck with a rimless, bottleneck case. The 7mm PRC will beat the following cartridges in sales over the next 20 years: 280AI, Gunwerks LRM, and the 7mm Rem Mag. Now, I either need to find ammunition to shoot, or new brass. on steroids. The specified twist rate for each cartridge dramatically impacts the ability for a firearm to spin a bullet fast enough to stabilize a long bullet in flight. Every hunter needs to read this and understand the real limitations of their ammunition.

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7mm rem mag ballistics chart 1000 yards