1-10 out of a 30 cal is like peas and carrots, covers a lot of ground.
Another popular twist is the 1-8" with a 223 AI shooting the 75g A-Max, hands down winning combo. 1-9" twist is border line on a good day with the 75g A-Max, while the 1-8" twist is spot on perfect.
However, since I could go to 90g 22 caliber bullets in my 223AI and 22/250 AI, why should I not put a 1-6 twist on my rifles to accommodate the 90g? Answer: The 1-8" twist is perfect of the 75g A max, that's why!!! I don't have any intention of ever shooting a 90g, but maybe I should go ahead and order 1-6" twists just in case I really don't know what I want.
