I had Pac-Nor put a 17 inch tube with 8 inch twist on my 264. I am liking it with 13 AB and 140 GK bullets. I am pretty sure it will work with 140 Scenars as well.
is that 17 a typo? I have a pard with a .264 in a M70 FW (22" barrel).
I've never wished for a slower twist. I may even go 1:7" next, just for giggles...