.308 / 7.62mm 1:15 up to 150 grains
1:14 150 – 168 grains
1:12 168 – 170 grains
1:10 170 – 220 grains
1:8 220 grains or more
According to this, I can stabilize 168-170 grain bullets with a 1:12 ratio. Is anything smaller than this too fast of a twist ratio.
I wanted to load 150g Matchkings and Gamekings at 150 grains, but this chart made me question if my twist ratio is too fast.
1:14 150 – 168 grains
1:12 168 – 170 grains
1:10 170 – 220 grains
1:8 220 grains or more
According to this, I can stabilize 168-170 grain bullets with a 1:12 ratio. Is anything smaller than this too fast of a twist ratio.
I wanted to load 150g Matchkings and Gamekings at 150 grains, but this chart made me question if my twist ratio is too fast.
Last edited: