Thread: 22-250 PPU 55gr on game

Originally Posted by Marty Henry

I'm surprised they stabilize I ran them through the green hill formula and came up with them needing a 12 inch twist above 2800 fps and 9 inch below that. I've previously had experience with a 68 grain bt hp that chronied 2950 and produced tight groups at 100 yds but wouldn't get on an a4 sheet at 200 turned out it was marginally stable at launch speed but needed a 1:7 twist below 2800 fps. Rifle was a savage 1:9 223.

That's just about perfect instability if you want tumble on impact lol.