If you throw a big rock, it puts a big hole in the ground, but doesn't go so far. since Im a fan of your youtubes, my question to you: I have the 6.5 PRC and 300 PRC, and Im sure a 7mm PRC will be in my future. Its currently in a google sheet so I can easily share access with a good email. 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! The amount of wind deflection is basically determined by how large the drag forces are and how long those forces act on the bullet. 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. With that bullet, drop at 1000 would be measured in yards. In fact, Id guess that 60% of the new hunting rifles in most gun stores today are chambered in a cartridge designed by Hornady. If you hunt and want to shoot at a longer range, you may be wondering what the effective range of a rifle cartridge is. For what its worth longest shot was 823 yards with my Leupold vx2 3-9 but that was eight years ago Using dies from Whidden, I got to work. It resists wind drift well. Required fields are marked *. Jim Harmer is a host of the Backfire Youtube channel. I just finished my 7saummight need to do an identical build but in 7prc and compare. Altitude: 0 Feet with a Standard Atmospheric Model. We will ignore any left/right effect, and focus on the vertical errors. Its all highly situational, but it matters. Then our errors are within the accuracy potential of our hunting rounds. 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. They have some cool videos that explain it better than I can. The maximum effective range of the 6.5 PRC for hunting is approximately 730 yards, at which distance many bullets will slow below 1,900 fps which can cause a bullet to fail to expand. Still a cool round for someone first using a .284 round. If you own a 7mm Rem Mag, its easy to produce 7mm Rem Mag Ballistics reports using Shoot! for a 6 inch vital zone (typical of a whitetail deer). This means that velocity is the big player effecting how much a bullet will drop. 61.6 grains H4831sc with 195 berger gives 2975fps. I was hoping to optimize the cartridge . Hi Jim, Im a follower on YouTube, I really enjoy all of them. Compact 1000 yard rangefinder. 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. I think the biggest win for the PRC however is the factory support that the SAUM lacks. Obviously Hornady makes dies for the 7 PRC, but I personally am not a fan of their dies. Again we see how important a short time of flight is to minimize these effects. 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? This can be useful in comparing cartridges or loads. Ive left comments but could use some advice. How do you think it will shoot the Barnes 168 gn LRX in case this new lead ammo ban goes through? I enjoy your videos. Shot placement, bullet construction, and animal individuality will all dramatically impact the effectiveness of the bullet. At 500 yards the 7mm's ballistic advantage begins to matter with nearly 10 inches less drop than the .270, 6 inches less than the .300. A good laser rangefinder is a tool, and if it isn't used properly it won't yield good results. But these eyes have seen better days (literally). 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. Awesome article and information. Well, that would limit most hunting rifles to between 150 and 400-yards. Your email address will not be published. Jim, Im wondering why you did not include the Winchester 284, in your comparative with the lineup. Mag. I find your data a bit too limited, which can vary greatly depending on multiple other factors. That sounds really cool. Every hunter needs to read this and understand the real limitations of their ammunition. Graph below shows the energy remaining at 500 yards for the same load: At 500 yards the remaining energy is 1710 Ft-Lbs. With the high BC of some of the 7mm bullets, ballistically this 7mm PRC will outshine most 6.5mm and 30cal cartridges. Max range 600yard, would like to shoot the 180s. with 50 inch barrel. I apologize for the misunderstanding. 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. It is a great investment if you want to get into long range shooting and will be especially useful if you handload. Jim, I enjoy that you use your platform to provide reliable data to ethically take animals. Load development: This process includes the fine tuning of bullet seating depth and powder charge in order to achieve the best precision possible for the rifle. 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. Couple questions for you. The 7mm Rem. You can get a new barrel for your Ruger American, Tikka, Bergara, Savage, etc. This package can be added onto any rifle bought through Evovled Ballistics. If you want to knock it down.. use a 7mm. You have stated several times you would not use 6.5 Creedmoor or 6.5 PRC for large game like elk. This is for academic purposes only. We develop the ideal load for your rifle that is tailored specific to your requirements, hunting or target. Lol. If you throw a big rock, it puts a big hole in the ground, but doesn't go so far. 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. 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. 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;}. Do you have any MV numbers from your 20. Here is my info: 3040 FPS, 160 accubond at .531 b/c, 50 degrees and 5000ft. He is a well-known entrepreneur, having started many successful online brands, and lives in St George, Utah. The PowerRank is an estimation of the cartridge power. I quickly saw that the 4 fewer grains of case capacity in the 7 PRC made these powders not ideal. And shoot 168 Barnes tipped triple shock bullets along with Berger VLD at same weight and load. Snow. Trying to decide between the new hot rod 7prc and the old standby (perfect) .280Ackley. Should be the next level do it all cartridge. The sample trajectory in Figure 1 is typical for a 7mm Remington Magnum shooting a 168 grain VLD bullet at 3050 fps muzzle velocity. CHEERS!!! For a better experience, please enable JavaScript in your browser before proceeding. If you do not have a Shooting Chronograph, I strongly suggest you purchase one. Whidden has the dies for 7 PRC. Hornady ELD-X and Barnes LRX both will expand at 1600 fps. Pinsoft Software. If your max is 400-yards and the deer is moving, perhaps stick to 200-yards. I always run a suppressor would like to see 20 with suppressor vs 24 with break. No obvious pressure signs, but I didnt feel I should compress further. Jim Harmer is a host of the Backfire Youtube channel. Unlike a load data book from one of the ammunition companies, I am not measuring pressure with a computer. At 1000 yards the rotation of the earth is basically moving your target down 2.6 inches per second if you are pointing east, and up if you are pointing west. The 7mm PRC is similar to a 7mm Rem Mag, but it can shoot heavier bullets with higher BCs, has no belt which causes problems for reloaders, and slightly less case capacity so longer barrels are not necessary. The Bigger Question is, whats YOUR maximum? Decreasing wind deflection is a very important part of precise long range shooting. Ok ya that makes sense. Just like shooting near dawn or dusk, or shooting into a glare. It is on the upper end of what most large adult shooters can comfortably tolerate. I am currently building a 7 prc on my .338 win mag action and a Lilja 1:9 twist stainless barrel. My prediction? But what are the flattest shooting rifle cartridges? I am using this data for Scope choice. Again, BC and velocity is important. Your email address will not be published. Wind Drift diagram showing how the forces act on a bullet. Flat nosed pistol bullet on the left, .308 Cal 168 grain Barnes TSX center, VLD shaped 7mm 168 grain far right.But it doesn't take a huge difference in bullet shape to have a big effect when we are comparing velocities over 1000 yards. Im still using the same 24 test barrel by Preferred Barrel Blanks for this cartridge. Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. thank you. These cartridges all drop less than 255 at 1,000 yards. Love what youre doing. You did not compare this cartridge to the 7mm RUM? As we examine the drop and deflection of a bullet it becomes apparent that BC and velocity are very important parameters for shooting at long range. The email address you entered is not valid. Itll get tons of penetration and you could shoot that light of a bullet VERY fast. 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. Mag. 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. Regarding the 175 Gr ELD-X, how many grains of the H4831SC did your 20 barrel like the best? 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. 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. He has managed multiple gun ranges, and has hunted around the world. I really enjoy every bit from Income School! Nice informative article. A hunting firearm can only be so heavy, and a smart shooter will only subject himself to a limited amount of recoil. 375" drop w/ 100 yard zero. 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! If it performs like my 6.5 PRC and 300 PRC, Im guessing it will be a winner too. Hey Jim, thanks for all the great content. I think too many hunters see muzzle velocity and assume if its fast, itll work long range, and thats not true at all. I hope brass makers continue to make 7mm STW brass. The reason that the bullet deflects, is because its initial flight path or direction is different from the wind vector and resulting bullet attitude. As a competition gun and a capable do all cartridge the 7 PRC absolutely checks just about every box there is I look forward to adding it to my 7mm-08 (for 120-150gr bullets) and 280AI (for 140-175gr bullets) as a capable 7mm magnum that isnt tremendously overbore and specialized for heavier (160gr+ bullets). Interestingly, I loaded 61.2 grains of H4831SC in a 7mm Remington Magnum, and a 7mm PRC. Hi Jim, Every effective range calculation will, by its nature, be only a broad approximation. 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. As an Amazon Associate I earn from qualifying purchases. What are the speeds youre getting with your 20 barrel? Point blank range is 302 yards. Does anyone know how hot you can load a 162 gr. Canting your rifle scope (tipping it left or right) can also cause significant left/right error. I think all the powders you have tried except H4831SC are too slow. Red Oak, White, or Chestnut for Deer Herd? Magpro had a lot of case capacity left, but wasnt getting the velocity Id hope to see without just burning a ton of powder. Corriolis effects from the earths rotation also needs to be compensated for. What we have here is failure- to communicate. Wonderful! Someone forgot the grand daddy of 7mm mags! Load Swift's 150-grain Scirocco at 3,036 fps delivers outstanding terminal performance. Given Hornadys target load of 180gr at 2,950fps, this is likely a max load. 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. Note that with these loads, I switch to a standard large rifle primernot a magnum primer. Commissions are earned for links to Brownell's, Amazon, MidwayUSA, GoHunt, OpticsPlanet, Sportsman's Warehouse, and other retailers. Matt. Your load data is tied to your rifle serial number and thus can be ordered from us at any time. Keep it up! do you know the 7mm Blaser Magnum? I chose to put a Proof barrel on and had an M16 extractor installed and am very happy with the results. Simple as that. Shortening the H&H case to a length of 2.500 inches, and using a 25-degree shoulder, the 7mm Remington Magnum has an overall cartridge length of 3.290 inches. Though it is designed to headspace off the belt of brass, handloaders can improve concentricity by using the shoulder for headspacing. The first, and most obvious is the effect of gravity. for a 6 inch vital zone (typical of a whitetail deer). Great article! Again, weight of the bullet plays a large role in bucking wind. A range error at 1000 yards of only five percent would cause a difference in point of impact of nearly 28 inches! Any idea on predicted velocities for it? It really looks like this might be the do all cartridge Ive been waiting for. I was somewhat surprised by the list of firearms manufacturers who are not yet jumping on board with the 7 PRC. Save my name, email, and website in this browser for the next time I comment. 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. I see yours has a suppressor. Further comparison shows that is flies faster than either of the 3 other rounds, and only the 270 Win beats it in terms of average power, but the 7mm is the victor in the average energy as well having 3106 lbs of force from muzzle. Please keep the good stuff coming. Humidity plays an almost negligible role. Policy. Rifles, Bullets, Barrels & Ballistics . This load has been optimized in Shoot! Not all bullets are Max-Range bullets. With quality hunting ammo, this cartridge maintains 2000 fps velocity to around 600 yards. Jim, What is the mounting method, QD or threaded? Testing 160-168 Gr bullets. 1400 W Henry St Im running a 20 tube on a Bergara action. Is that right? Please use a 300 yard zero and give me 100 yard clicks out to 1000 yards. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. ShootersCalculator.com is in the process of being massively overhauled. Thanks, Jake. ballistics app/software that you can understand and use in the field (either target shooting or hunting). The two most important variables are the Initial Velocity and the Ballistic Coefficient. We use cookies to provide you a better user experience. The pistol bullet will slow down much faster, see Figure 2. The 7mm Precision Rifle Cartridge is a long-action centerfire rifle cartridge designed to shoot 180 grain bullets at 2,950 fps. 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 . Please let me know how it can be improved upon. 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! It just takes experience, and a willingness to shoot often and learn something every time you pull the trigger.The more you shoot and practice, the more you will realize how difficult precision shooting at longer ranges can become. The following table compares the 7 PRC to several other cartridges using Hornadys Precision Hunter line of ammunition. I have a complete article on the best rifles available now in 7mm PRC. The ballistic data below was calculated with a Hornady 180gr ELD-Match 7mm bullet fired at . What barrel length has Hornady created the 7mm PRC for? Quanto pesa il sistema che hai realizzato? 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. 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? How to Sight in a Scope - Step by Step Guide. Where can I get 7 PRC brass? The 7mm Rem Mag is another specialized cartridge that deserves comprehensive ballistics analysis using Shoot!
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