Count me in as a 7mm STW shooter. Ciao Jim caccio in zona Alpi in Italia cammino molto e vorrei un arma leggera . Backfire LLC owns and operates this website. Heres what he reported using a 175gr ELDX, Federal 215M primers, and Reloder26 powder. Mainly, because of our inability to directly quantify wind speed and direction as we can with distance when using a rangefinder. Someone forgot the grand daddy of 7mm mags! To optimize performance of the 7mm RUM, Remington engineers produced a chamber design utilizing .400" (10mm) free bore. Why is it a foregone conclusion that Shooters will gravitate toward heavy-for-caliber high-BC bullets in the 7mm PRC? How much velocity would I lose with that shorter barrel? Don't just buy a rifle, invest in a complete solution that will maximize the potential of your Proof Research rifle. 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. The Barnes bullet loses velocity at twice the rate of the VLD! A good laser rangefinder is a tool, and if it isn't used properly it won't yield good results. 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. ballistics software for your PC & Mac. On that same goat hunt, I missed a longer shot because I didn't read my terrain perfectly, and an updraft caused me to shoot right over his back. Now, I either need to find ammunition to shoot, or new brass. We will ignore any left/right effect, and focus on the vertical errors. Im a big fan of the 7mm. Seldom is the practical max the same as the true max distance. Depending on bullet type and construction, the minimum expansion velocity for rifles falls between about 1300 and 2000 fps. If it performs like my 6.5 PRC and 300 PRC, Im guessing it will be a winner too. About -10+ yards! Based on the 7mm PRC data you shared, would you use the 7mm PRC for elk and large North American game? If you would like more information about any of these topics in an easy to understand format, try Robert Rinker's Understanding Firearm Ballistics. This setup is for long range target shooting. This package can be added onto any rifle bought through Evovled Ballistics. i have a 6.5 prc after reading this page on 7mm prc theres not enough extra hump in this new prc to justify buying one, I have three 7mags but I also have a 300wsm that lays down the gauntlett and beats this prc at everything. 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. You did not compare this cartridge to the 7mm RUM? No visible pressure signs, but likely overpressure. Wind deflection, or drift as we usually refer to it, does not occur from wind blowing on the side of the bullet. Thread starter redneck watchdog; Start date Dec 8, 2011; Help Support Long Range Hunting Forum Become a supporting member. 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. Using this as a reference, let's examine several other factors that can effect our shot placement. Its currently in a google sheet so I can easily share access with a good email. Windage differences are still within 2 inches. The 7 PRC is designed around the 180-grain ELD-Match bullet; however, some people will certainly point to the fact that the 7mm Rem Mag has been able to shoot 180-grain bullets for many decades. After that velocity diminishes very quickly. The higher the number, the better down range velocity retention. Be cautious when rebarreling a rifle into any of the PRC cartridges. Your rifle will be sent over to Evolved Munitions LLC who will then begin the load development process. 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. The first, and most obvious is the effect of gravity. I dont like playing games of how far can I go and minimum bullet energy. 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. Im getting impressive velocities despite the short length, and the accuracy has been insanely goodone of the most accurate rifles Ive ever shot. 7mms in general produce such good ballistics like higher retained velocity, energy, etc because of the bullets made for this caliber. Jim Harmer is a host of the Backfire Youtube channel. Mag. A 10 MPH wind will move a bullet about 10-12 feet laterally. Eh, someday. 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). It has a length of 2.035 inches, 2.80 inches overall, with a 1:9.5 twist and a large rifle primer. 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. 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? Every hunter needs to read this and understand the real limitations of their ammunition. Last, I shot Accurate Magpro powder with the same 175gr ELD-X and CCI large magnum primer out of a 24 test barrel. The only other company Ive seen with die sets is Whidden Gunworks. In this post, well look in-depth into that question. Hey C3, Aren't Bases for long range higher in the rear as to give better muzzle elevation to scope alignment? If you check Hornadys load data it shows N560 for every bullet except the 190. Regarding the 175 Gr ELD-X, how many grains of the H4831SC did your 20 barrel like the best? While I like and support new cartridges, does the PRC provide anything new? Copyright 2023 ShootersCalculator.comALL rights reserved. Hopefully with its introduction it will make SAUM brass easier to find because more people will go for the PRC moving forward. Ive left comments but could use some advice. Unfortunately I wasnt able to find any standard case diagrams for the Sherman cartridges so thats really all I can say. I think your numbers might be off. Hornady has made the perfect 7mm case. 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! Figure 2. since Im a fan of your youtubes, my question to you: All the scopes I like seam to be out of my price affordability. Practicing in these conditions can yeild valuable experience.I'm always learning about how to become a better shooter, and I still make mistakes. But gravity drop is only the first of many effects that we need to compensate for, in order to shoot precisely at long range. We all understand how gravity works, and with the additional corrections for atmospheric conditions, a bullet's drop is easily calculated. The bullet does not drop below the speed within the max range specified. This information is provided to the shooter as well. I think the biggest win for the PRC however is the factory support that the SAUM lacks. Im not sure that muzzle velocity would have helped this discussion, though. It's like these other guys said, if you throw a small rock it goes really fast, but not very far. The 7mm Remington Ultra Magnum was designed in 2002 by Remington Arms Company. Any suggestions? On game heavier than 320kg, the 7mm RM is capable of producing adequate penetration but not wide wounding relative to body weights. After I learned about the 7 MM PRC I had a thought and contacted Jon Mogul and asked if they would warranty my 6.5 PRC barrel and they did! 5/8 to 1 groups at 500 yards. 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. Not being a downer on innovation, but 7mm STW is made by a lot more manufacturers than I see 7mm PRiCey ever being made by. External ballistics covers everything that happens during a bullet's flight between the muzzle of the rifle, and the target. Cartridge Type: RifleHeight: 2.5"Width: 0.532"Average FPS: 3024Average Energy: 3106Average Gr: 153Recoil: 2.06Power Rank: 4.63 of 20. If you want to knock it down.. use a 7mm. Sighting-in a hunting rifle to hit a certain number of inches high at 100 yards (or 100 meters) maximizes the point blank range of the rifle and cartridge and is superior to zeroing at a fixed distance like 200 yards. As an Amazon Associate I earn from qualifying purchases. That sounds really cool. 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. 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. We know the grain is different but that's as close as we could get with the Winchester Silvertips. 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 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. 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. You can get a new barrel for your Ruger American, Tikka, Bergara, Savage, etc. Corriolis effects from the earths rotation also needs to be compensated for. Exact same setup. Basically, like a wind vane on a roof or windmill, the bullet will align itself with the prevalent wind. Required fields are marked *. Im still working on a load. Not all bullets are Max-Range bullets. I chose to put a Proof barrel on and had an M16 extractor installed and am very happy with the results. Input your hunting conditions to see the drop, drift, bullet trajectory, velocity, and energy in easy-to-read ballistics charts and graphs. Thats exactly what the 7PRC is, but it is by no means the only cartridge that offers those specs. Also, remember that the data in the table above is using averages of multiple loads per cartridge. In fact, it may be about the best choice on the market for my personal preference. Interestingly, I loaded 61.2 grains of H4831SC in a 7mm Remington Magnum, and a 7mm PRC. I saw the BIG ballistics spreadsheet on your youtube videos, you should share that. In the 1960's Remington created the 7mm Remington Magnum based of the 375 H&H cartridge design. 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. For this load, I chose the 195 Berger EOL and loaded it to max COAL of 3.34. If your max is 400-yards and the deer is moving, perhaps stick to 200-yards. In summary, this is why the 7mm Rem Magnum is an excellent ballistic performer. My 7 PRC will be in my hands Thursday so I will let you know how N560 and a 175 Hornady ELD-X does. Backfire was the first publication to put together a 7 PRC as soon as the SAAMI specs for the cartridge were released. I think too many hunters see muzzle velocity and assume if its fast, itll work long range, and thats not true at all. Though the sub-quarter MOA precision and low ES and SD are not guaranteed, they are the norm. I apologize for the misunderstanding. I used the same primer, and the same 175gr ELDX bullet. Just wondering. 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. Compact 1000 yard rangefinder. 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. Im not talking about self-doubt or simply asking yourself what if I miss. Use a small level, and look closely at new rangefinders that incorporate incline shooting compensation. same principal applies to bullets. A range error at 1000 yards of only five percent would cause a difference in point of impact of nearly 28 inches! for a 6 inch vital zone (typical of a whitetail deer). Factory Savage 7mm rem mag 1000 yard video. 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! Ive got it sending the 162 grain ELD-X 3200 FPS. I guess the 7mm WSM is dead. .460 Steyr .416 Barrett .408 Cheytac .375 Chetac etc. This is more than adequate for taking down large game the size of elk at this distance, provided you use the right bullet to penetrate to reach the vitals and place the shot accurately. Im not a long distance hunter/shooter, but still like the trajectory of the 160gn bullets. Perhaps my hunting rifle and bullet combo are capable of shooting 550-yards. The aim ballistically for Hornady with the 7mm PRC, is for a cartridge that will fire a 180gr 7mm bullet at around 2950 to 3000fps. Power Rank: 3.9 of 20. In addition to expanding reliably, a bullet must carry sufficient energy to take down the animal. 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