Thread: Redundant Calibres

Originally Posted by Jhon

Mmm..what do you reckon the capabilities of those frontiers top out at? 303 is a 1:10 twist correct? I have an Interarms Mark X in 308 with 1:10 twist and a bunch of Frontier CMJ flat point .308dia ( semi RN really) 150gn projectiles. What max vel do you think they would hold up for?

Greetings @Jhon,
I was using the same load as I use with these projectiles in my .308, 32 grains of AR2206H. In the .308 these chronograph 1,910 fps and shoot really well. I think that it was the very deep two groove rifling in the .303 that did them in. You should be able push them harder than that if you want to in your .308. My load does shoot way low compared to the full power loads so I need to dial to zero them when I use them
Regards Grandpamac.