All my 22-250's have been either 14 or 12 twist, there've been several both standard and AI, and most are / have been 14 twist. And I mostly shoot 50 BT's through them. I wouldn't use an 8 twist but that's just me. The slower twist is forgiving and it's easy to find fast accuracy. Shooting 50's and 55's, W760 powder worked. Now I use Reloder 15 in both the 22-250....50BT@ 3925, and the 22=250AI....50BT@ 4200. Most accurate loads. I think 2700 would also be good also but I"ve never felt the need to try it. Again, it's just stupid easy finding accuracy with the slower twist and lighter bullets, I'd go with a 12.I want a lightweight 22-250 but can only find a 8 twist blank in a #2 contour. Worried about over rotating light bullets. I love 8 twist in 223 but this is 5-600 fps faster.
In the 3500-3600 range. I don't need screaming or yurtle loads.How fast are you thinking?
Also, with a twist faster than is necessary for the bullet length you will hit pressure limits at a lower MV and you would with a slower twist.
I built a 8 twist 22-250. I have a load with 55 gr. Bullets that is very accurate. I’ve shot this load at pd’s with good success. I use 4064 powder. Got this load from this forum.All my 22-250's have been either 14 or 12 twist, there've been several both standard and AI, and most are / have been 14 twist. And I mostly shoot 50 BT's through them. I wouldn't use an 8 twist but that's just me. The slower twist is forgiving and it's easy to find fast accuracy. Shooting 50's and 55's, W760 powder worked. Now I use Reloder 15 in both the 22-250....50BT@ 3925, and the 22=250AI....50BT@ 4200. Most accurate loads. I think 2700 would also be good also but I"ve never felt the need to try it. Again, it's just stupid easy finding accuracy with the slower twist and lighter bullets, I'd go with a 12.