Thoughts on 6mm PRC

[Rickmt]

I would appreciate input on 7mm PRC RIFLE. I am especially interested in hearing from people who actually own and use this caliber. I am considering purchasing a Christensen arms ridgeline . This would be a big brother to the 6.5 PRC that I already own and is one of my most accurate rifles.

 

[Hunting Hitman]

I would appreciate input on 7mm PRC RIFLE. I am especially interested in hearing from people who actually own and use this caliber. I am considering purchasing a Christensen arms ridgeline . This would be a big brother to the 6.5 PRC that I already own and is one of my most accurate rifles.

I own the 7mm PRC in the Bergara Carbon Cure configuration. Took a Pronghorn this past September at 350 yards and it felt like a chip shot.
The 6.5 PRC is close to the 7mm PRC and honestly if you want more of a difference would go with the 300 PRC.

It’s a great caliber though.

HH

 

[375 Ruger Fan]

I did a recent elk hunt and used the outfitter's 300 PRC and was amazed by the performance. I have since done a little research, with the thought of buying a 300 PRC. After watching this video from Ultimate Reloader, there is a good argument to be made for the 7mm PRC.

 

[Fatback]

I just had one built on a LH M70 that was a 338 Win Mag in its previous life. Have gotten it dialed in and have shot a couple of deer with it. So far, I am really impressed with accuracy and terminal performance on deer. I am shooting 170 grain Terminal Ascent cartridges.

 

[Rickmt]

I did a recent elk hunt and used the outfitter's 300 PRC and was amazed by the performance. I have since done a little research, with the thought of buying a 300 PRC. After watching this video from Ultimate Reloader, there is a good argument to be made for the 7mm PRC.

Great explanations. Thank you.

 

[Manwe]

I am working on a 6 PRC and have done a couple 25 PRCs and havent had any issues with Berger LRHT bullets spinning fast. 7 twist 25 PRC pushing the 135 at 3250fps = 334,285 rpm. 6 PRC 7.5 twist pushing the 109 LRHT at 3500fps = 336,000 rpm. Its certainly pushing it hard and other variables will come into play when running on the edge like that.

I am curious how a bullet's jacket failure due to excessive rpm varies based on the length of the barrel? Getting a 109 to shoot at 3500fps out of a 26" barrel will obviously take more powder and pressure than the same velocity with the same bullet out of a 30" barrel. RPM of the bullet would be the same leaving the muzzle of both length barrels, but that bullet accelerated to that rpm more quickly in the shorter barrel. I dont think we can safely assume that a particular bullet will always fail at a certain rpm window because there are other variables involved in how quickly it arrives at the max rpm. I think it is safer to assume that the quicker a bullet reaches max rpm, more stress has been imparted onto the jacket and it is thus more likely to fail.