Thread: 300 BLK AR Replacement - Plan B iteration #27

I had a bit of time on my hands so ran a whole series of "simulations" in Quickload, with the aim of duplicating or slightly bettering 300 BLK ballistics while not increasing factors that contribute to the noise signature of the load. Basically I was aiming to get a 125 Gn bullet at at least 2100 fps (2450 would be better) without using more than about 20gns powder or a muzzle pressure that exceeded about 5000 psi.

It wasn't possible in the 308, you have to get up to about 27 gns of Blue Dot, and using pistol powders in this way can produce erratic (potentially dangerous) results.

So I thought I'd try 260 with the 123 Gn bullet, and that was worse.

So it looks like I'll have to stick with 300 BLK or 7.62x39 after all.