Savage1920
09-18-2013, 06:00 PM
In reply to post #19
The twist rate was one of the more difficult decisions. Since I’ll be shooting cast bullets in the range of 150 to 170 grains at a range of 100 yards, I opted to go with a 1 in 12 twist. I almost went with a 1 in 10. However, the twist rate formulas I used for the bullets and velocities I expect kept pointing to the 1 in 12.
Also, if a 1 in 12 was good for the people who originally designed the 30-30 Winchester and the 30 Remington it should be good enough for me. If I was going to shoot bullets in the range of 180 to 220 grains I probably would have gone with the 1 in 10.
Right now I have a Krieger #4 contour CM barrel .300/.308 with a 1 in 12 twist waiting for the chambering reamer to arrive.
Yeah ok I was just wondering. I thought you might be going with something slower with cast bullets. I think they went with 1in16 in the 32cal with cast bullets in mind. Wasn't sure what twist would be best in 30cal with cast bullets.
The twist rate was one of the more difficult decisions. Since I’ll be shooting cast bullets in the range of 150 to 170 grains at a range of 100 yards, I opted to go with a 1 in 12 twist. I almost went with a 1 in 10. However, the twist rate formulas I used for the bullets and velocities I expect kept pointing to the 1 in 12.
Also, if a 1 in 12 was good for the people who originally designed the 30-30 Winchester and the 30 Remington it should be good enough for me. If I was going to shoot bullets in the range of 180 to 220 grains I probably would have gone with the 1 in 10.
Right now I have a Krieger #4 contour CM barrel .300/.308 with a 1 in 12 twist waiting for the chambering reamer to arrive.
Yeah ok I was just wondering. I thought you might be going with something slower with cast bullets. I think they went with 1in16 in the 32cal with cast bullets in mind. Wasn't sure what twist would be best in 30cal with cast bullets.