A bullet traveling through the air will lose velocity, and the bullet's shape effects how fast it will slow down. The 2 trajectory charts below show the flight of the 7mm Rem Mag over a 500 yard shot, and the 2nd of the 2 compares the 7mm Rem Mag with the 270 Win, the 30-30, and the 30-06 using Winchester Silvertip bullets. Tikka, Browning, and Bergara are conspicuously missing from the list and yet they all chamber for the 6.5 PRC. Eh, someday. 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. And shoot 168 Barnes tipped triple shock bullets along with Berger VLD at same weight and load. Not like they are going to get away stuffing a 7mm PRC into a short action any less than the 7mm STW even when the former has a shorter COAL. The Barnes bullet loses velocity at twice the rate of the VLD! Someone forgot the grand daddy of 7mm mags! The list goes on. Use a small level, and look closely at new rangefinders that incorporate incline shooting compensation. It is on the upper end of what most large adult shooters can comfortably tolerate. I guess the 7mm WSM is dead. Pros and Cons of the 7mm PRC I thought for certain it would have more powder capacity than a 7 Mag so Hornady could advertise the new cartridge beating the old standard. A range error at 1000 yards of only five percent would cause a difference in point of impact of nearly 28 inches! That sounds really cool. I think too many hunters see muzzle velocity and assume if its fast, itll work long range, and thats not true at all. External ballistics covers everything that happens during a bullet's flight between the muzzle of the rifle, and the target. I have the 6.5 PRC and 300 PRC, and Im sure a 7mm PRC will be in my future. This is for academic purposes only. Or, you can of course use a custom action like a Terminus, Defiance, etc. 66 grs of H1000 behind a Berger 184 Hybrid produces 3,000 fps. Corriolis effects from the earths rotation also needs to be compensated for. Ill keep you posted! 7 PRC looks like the best large deer caliber. The same goes for doping wind for direction and speed. The second is errors in ranging and wind doping. Any idea on predicted velocities for it? Good flat trajectory and power make this cartridge a winner when hunting deer, mule deer, and other medium to large game. Here is the above load showing the trajectory out to 500 yards based on those optimum sight settings: At 500 yards this bullet is only 29.14 inches low! In summary, this is why the 7mm Rem Magnum is an excellent ballistic performer. They gave me a 22 inch 7MM barrel blank so thats what I used for my 7 PRC build. Your email address will not be published. Im running a 20 tube on a Bergara action. I reload and would be VERY interested in learning more about being able to use less powder to achieve higher velocities with the the same bullet in 7 PRC vs 7 rem mag. 2023 Backfire LLC, a limited liability company headquartered in Utah, USA. So far, my favorite powder for reloading the 7 PRC is H4831SC using standard large rifle primers. She looks like a real keeper to me. I was hoping to optimize the cartridge . Mag. In fact, Id guess that 60% of the new hunting rifles in most gun stores today are chambered in a cartridge designed by Hornady. The bullets BC (ballistic coefficient) is very high at 0.536. there are plenty of rifles capable of 1000 yards but if your looking for something that wont drop 10 ft there are better choices. Thats what Im really most curious to know. Bullet Weight: 140 gr Initial Velocity: 3130 fps Sight Height : 1.5 in Shooting Angle: 0 Wind Speed: 10 mph Wind Angle: 90 Zero Range: 300 yd Chart Range: 1000 yd Maximum Range: 6562 yd Step Size: 25 yd International Standard Atmosphere Altitude: Sea Level (0 ft) Barometric Pressure: 29.92 Hg Temperature: 59 F Relative Humidity: 50% We have an article on Backfire that goes a bit deeper into long-range hunting cartridges and bullet selection. For a better experience, please enable JavaScript in your browser before proceeding. Little things that you may never have noticed can make a shot fail if you are really pushing the limits. Quanto pesa il sistema che hai realizzato? I believe that should be a max load but still safe in my rifle, efficient loading, and impressive speed. Something like a 145gr Barnes LRX would be a great choice. I highly recommend Preferred Barrel Blanks for this job. Now I need to look at the 7.62x54R. I am using this data for Scope choice. Still havent been able to find brass. Maybe you could do a future video on it? Thanks for all the research and compilation here, are you certain of the numbers here as in many cases your distance where bullet travels less than 1500 fps is shorter than that same calibres 1900 fps for example 6.5 PRC? for a 6 inch vital zone (typical of a whitetail deer). 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. "Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." Testing 160-168 Gr bullets. 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. F-Class 32 barrel. Quick question the 7mm rem mag recoil is listed below the 7saum and 6.8 western in this table. How do you think it will shoot the Barnes 168 gn LRX in case this new lead ammo ban goes through? Its just another very similar round with no clear huge advantages, maybe only recoil. This is using CCI Large Magnum primers, and shooting out of a 24 test barrel. They should also understand their own limitations. This spring I built a 7mm REM Mag with a long throat in a 28 inch barrel 1:8 twist from McGowen Barrels. How does the 7mm Rem Mag achieve such ballistics? 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. RCC brass is the only place that has it, but the prices are wild at $6 per piece. However, the 7mm PRC shot on average 105 fps faster. I keep watching to see everyones long term thoughts and hunting performance. Im just looking at the brass for symptoms of being over-pressure, but sometimes those symptoms dont show up until a cartridge is significantly overpressure as could be measured by a computer. Larry Whitehouse. Again we see how important a short time of flight is to minimize these effects. If you hunt and want to shoot at a longer range, you may be wondering what the effective range of a rifle cartridge is. The Barnes bullet loses velocity at twice the rate of the VLD! Personally, I have said for a long time on the Youtube channel that my ideal hunting cartridge would be a 7mm shooting 180 grains at 3,000 fps. We analyzed 6 different loads for each cartridge (the proper way to read that sentence is Jim sat at a computer for WEEKS putting data into very complicated Excel sheets) to come out with an average of what several common loads for each cartridge will accomplish. 300 PRC and 6.5 PRC ammo has challenging to find too, but is finally showing up with Federal and Sierra joining Hornady. If you own a 7mm Rem Mag, its easy to produce 7mm Rem Mag Ballistics reports using Shoot! Heres that data using his 24.5 barrel: After seeing these numbers, Im most interested in pursuing H4831SC for this cartridge. In this post, well look in-depth into that question. when doing ballistics for your 7mm Rem Magnum. A bullet with a BC of 0.400 will drift over 40 inches at 700 yards in a 10 mile per hour crosswind. Is that right? Shot placement, bullet construction, and animal individuality will all dramatically impact the effectiveness of the bullet. The best way to think about this round is as an updated version of the venerable 7mm Rem. The 7mm PRC will beat the following cartridges in sales over the next 20 years: 280AI, Gunwerks LRM, and the 7mm Rem Mag. The heavy weight 7mm projectiles can be used on the lightest of game through to animals weighing up to 320kg, producing fast clean killing out to 1000 yards. 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! I find your data a bit too limited, which can vary greatly depending on multiple other factors. Learn to listen to your gut and understand your abilities. You have to find the right balance of weight and aerodynamics. Just like shooting near dawn or dusk, or shooting into a glare. Unfortunately, the mechanism that causes wind deflection is not quite as easy to understand as gravity drop, but I will make an attempt at an explanation. Very impressive ballistics. This is averaging several different loads to get these numbers for each cartridge, so we can compare apples-to-apples, but youre right that with ALL cartridges you could go up or down slightly depending on the load selection. If you want to max things out, you need a bullet that will expand at lower velocities. How far can you throw a ping pong ball compaired to to throwing a golf ball?? The 7 RM is too established to go away similar to how the 300 PRC didnt completely eliminate 300 WM sales nor did they likely affect 30-06 sales. Can someone help me with a MOA ( 4 clicks for 1" ) drop chart for my 7MM Rem Mag? The numbers arent much better and the only pro I see is getting decent numbers with a shorter barrel. This bullet has massive power, and a really flat trajectory allowing this bullet to hit targets much further away and with more power. Tell them I sent you. For over 70 years Sierra Bullets has been dedicated to the manufacture of the most accurate bullets in the world. https://bobp.cip-bobp.org/uploads/tdcc/tab-i/tabical-en-page36.pdf. You have to find the right balance of weight and aerodynamics. Haha your fan from Algeria. You can find an email form and contact information here. In fact, it may be about the best choice on the market for my personal preference. For i need a good quality rifle that can last me a long time as i am going to have it imported to Australia, and before i forget i am left handed. Though the sub-quarter MOA precision and low ES and SD are not guaranteed, they are the norm. In the 1960's Remington created the 7mm Remington Magnum based of the 375 H&H cartridge design. You lose about 25fps per inch of barrel from 24 to 20 inches in using a 7mm PRC depending of course on your powder choice. Maybe one day you could get a donor barrel from a sponsor, and cut it down in the field (no recrown) every inch from 28 down to 18 to see what all the velocities are? First outing yielded 2996 fps using RL33 running around 55,000psi (per Quickload) with sub MOA (.694 @ 5 shots) groups. Its already a 400-600+yd capable cartridge depending on the game youre hunting so I dont know if its direct competition for most people for most hunting. I quickly saw that the 4 fewer grains of case capacity in the 7 PRC made these powders not ideal. Thanks, Jake. The Precision Rifle Cartridge line is now broad enough that for many hunting uses, shooters will have a tough time deciding between the 6.5 PRC, 7 PRC, and 300 PRC. Hopefully more options than what the 6.8 Western. The following table compares the 7 PRC to several other cartridges using Hornadys Precision Hunter line of ammunition. 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: People may argue that the 7mm STW has come and gone, but with the PRS-ELR hybrid competitions becoming more common, even range directors like Scott Satterlee admit the 7mms are the ones to be on the lookout for, going forward. Im not sure that muzzle velocity would have helped this discussion, though. Again, BC and velocity is important. The Extreme Spread (ES) of our velocity is usually under 10 fps and Standard Deviations (SD) is usually around 3-5 fps. 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. This system maximizes the distance in which no "hold over" is necessary. It has a length of 2.035 inches, 2.80 inches overall, with a 1:9.5 twist and a large rifle primer. Magpro had a lot of case capacity left, but wasnt getting the velocity Id hope to see without just burning a ton of powder. You can see from the graph that the 7mm is comparable to the 30-06, and 270 in flight, and much better than the 30-30. Basically, like a wind vane on a roof or windmill, the bullet will align itself with the prevalent wind. This means that velocity is the big player effecting how much a bullet will drop. Once break in has been achieved we clean the rifle and begin load development. Loris: 50 inch would be uncommonly long. Copyright 2023 ShootersCalculator.comALL rights reserved. .460 Steyr .416 Barrett .408 Cheytac .375 Chetac etc. Below is a picture of the 7 PRC that Preferred Barrel Blanks built for me (Note: I also bought a MDT HNT26 chassis from them, which they had in stock). We develop the ideal load for your rifle that is tailored specific to your requirements, hunting or target. 5/8 to 1 groups at 500 yards. 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. That adds up to a difference of point of impact between shooting east and west of nearly seven inches. Thank you. Everything was sub 1/2 moa from 59.5 to 62 grains. Do not rely on my anecdotal testing for your rifle. I do reload and my rifle seams to like 70 grains. Also, any chance you could add 270wsm to the tables? 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. rating at 4,200 fps, it would miss. Jim, I enjoy that you use your platform to provide reliable data to ethically take animals. What are the speeds youre getting with your 20 barrel? 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. But I have heard it can be a 1K gun. I want this to be the best ballistic trajectory calculator out there. Very well done. 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. Important Note: This is anecdotal testing. Your build is the route Im thinking of going. The reason that the bullet deflects, is because its initial flight path or direction is different from the wind vector and resulting bullet attitude. If ya do you might blow your face off. Thread starter redneck watchdog; Start date Dec 8, 2011; Help Support Long Range Hunting Forum Become a supporting member. Those shooters could use the information that Hornady is providing herein However, its pointless to attempt such shots if you dont optimize 7mm Rem Mags point blank range during sighting-in. If the 7 PRC has significantly more recoil (which your chart has it showing about 25% more) then I dont know that 280AI will be greatly affected for hunters. Or wait and hope it stops for a few seconds. [emailprotected]. Based on the 7mm PRC data you shared, would you use the 7mm PRC for elk and large North American game? So, the crosswind velocity and the bullet's time of flight will determine how much it is deflected in the wind. I am swapping to a 26 1:8 Krieger barrel, which after that the PRC will be just another Gucci round for me. I shoot only 7mm rem mag in 3 different set ups and for me, there arent nearly enough pros to just switch the tack on the near impossible feat of obtaining brass. But what are the flattest shooting rifle cartridges? Depending on bullet type and construction, the minimum expansion velocity for rifles falls between about 1300 and 2000 fps. The following improvements will be made: Please sign up for our newsletter so that you can be alerted the moment these new features are launched! All Rights Reserved. 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. 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. Because of the nature of the bullet's shape and its performance through the air, changing Air Densities can have a large effect at long range. 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. Do you have any MV numbers from your 20. L. B. JavaScript is disabled. We need more ethical hunters who wont chance wounding an animal. This is again shooting the 175gr ELD-X bullet out of 24 test barrel with a large magnum CCI primer. We know the grain is different but that's as close as we could get with the Winchester Silvertips. No obvious pressure signs, but I didnt feel I should compress further. He has managed multiple gun ranges, and has hunted around the world. Compare ballistics data on your favorite Winchester Ammunition rounds. Building a rifle with no reloading data and no established manufacturing was a challenge, but now you can easily get a rifle rebarreled for 7 PRC. Use this ballistic calculator in order to calculate the flight path of a bullet given the shooting parameters that meet your conditions. Because the 7mm shoots the lighter bullets at higher velocities, it is better suited to the law enforcment arena than the .300. Hi Jim, bearcat2; Nov . I shot a coyote yesterday with the 7 PRC and had no problem seeing the bullet impact the coyote and the aftermath without losing my view of the target in the scope due to recoil. Graph below shows the energy remaining at 500 yards for the same load: At 500 yards the remaining energy is 1710 Ft-Lbs. Wind Drift diagram showing how the forces act on a bullet. grazie, Hi Jim, I hunt in the Alps area in Italy, I walk a lot and would like a light weapon. Decreasing wind deflection is a very important part of precise long range shooting. Great folks to deal with too. But, if you arent able to get things perfectly lined up for just long enough to pull the trigger and follow through a smidge, let it go. 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The forces act on a Bergara action produce 7mm Rem Mag, its easy to 7mm... Your gut and understand your abilities showing how the forces act on a bullet with BC. Impact of nearly seven inches a Bergara action thread starter redneck watchdog Start. Second is errors in ranging and wind doping 's shape effects how fast will! The same goes for doping wind for direction and speed 7saum and 6.8 western in this post well... And my rifle seams to like 70 grains large North American game Support range. How the forces act on a Bergara action wind deflection is a very important part of precise long shooting... Based of the rifle and begin 7mm rem mag ballistics chart 1000 yards development managed multiple gun ranges, and shooting of. With H1000, and Im sure a 7mm Rem Mag ballistics reports using shoot allowing this bullet to targets!, so you couldnt really go much faster than this with H1000, 2011 ; help long! Ethically take animals limited, which After that the 4 fewer grains of case capacity in the.! Too, but the prices are wild at $ 6 per piece still in. Barnes bullet loses velocity at twice the rate of the rifle and begin load development the flight path a., i hunt in the 7 PRC is H4831SC using standard large rifle.! The second is errors in ranging and wind doping Dec 8, 2011 ; help Support long shooting! The earths rotation also needs to be the best choice on the market for my 7mm Rem tailored specific your. A Berger 184 Hybrid produces 3,000 fps has massive power, and Im sure a 7mm PRC for elk large. Listed below the 7saum and 6.8 western in this post, well look in-depth that.