Twist rate for .257 115 to 130 monos; 257 AI

[TexasLife]

i went with a 7t for the 26" creed. built for 128-135's. velocities probably won't get over 3,100? lots of bearing surface compared to the 26cals of same weights within the same brand and type (match, hunting, etc). 7.5 wasn't an option or i'd gone that direction