7mm Backcountry anyone?

[ImBillT]

I was initially of the opinion that it was a great way to ruin a barrel and pierce my eardrums, but I have changed my mind. Looking at recoil calculations, powder mass is a huge factor. The powder mass doesn’t really increase compared to a 280AI. In terms of barrel life, heat is the main factory, and that’s primarily powder mass and bore area. Again, same as a 280AI. For muzzle blast, that’s pressure at the muzzle. Chamber pressure has a lot to do with powder burn rate, and bullet mass, but pressure at the muzzle is primarily based on powder mass and bore volume. Yet again, basically the same as a 280AI. Recoil, muzzle blast, and barrel life will probably all be slightly worse than a 280AI, but I suspect they will all be much better than a 7mag. I’m interested!!!!


I would like some once fired brass for experimentation. I’m considering just buying a box of loaded ammo.

 

[Robert N]

Federal 7mm Backcountry

I just read this article on it. Pretty cool if the claims turn out to be legit. https://www.fieldandstream.com/guns/federal-7mm-backcountry-ammo-review

www.hunttalk.com

 

[ImBillT]

Federal 7mm Backcountry

I just read this article on it. Pretty cool if the claims turn out to be legit. https://www.fieldandstream.com/guns/federal-7mm-backcountry-ammo-review

www.hunttalk.com

I skimmed, but I guess I should have used the search function!

 

[ismith]

Is it reloadable without a hydraulic press yet?

 

[VMHunter]

I think just with the bullet speed and grain weight the recoil will be on par or worse than a 7 RM/7 PRC.

You can’t gain extra velocity without giving something up. Can’t beat physics.

 

[Big Sky Guy]

I think just with the bullet speed and grain weight the recoil will be on par or worse than a 7 RM/7 PRC.

You can’t gain extra velocity without giving something up. Can’t beat physics.

True, but the explanation I’ve heard is the grain weight of powder contributes to recoil in addition to bullet weight. Less powder in 7BC than 7PRC/RM. my guess is somewhere a bit above .280ai but below the “magnum” recoil.

 

[ismith]

True, but the explanation I’ve heard is the grain weight of powder contributes to recoil in addition to bullet weight. Less powder in 7BC than 7PRC/RM. my guess is somewhere a bit above .280ai but below the “magnum” recoil.

Sounds like marketing to me, but what do I know?

 

[VMHunter]

Depends on the powder and the energy contained in that powder. I’d imagine to get to the 7 BC pressure there will be a lot more energy in that powder than what’s used in the 7 RM/PRC especially if there’s less powder.