I'm pretty sure the twist is 1-10", from what I've ready that should work fine on 55gr. I think I'm going to try the 55gr and just see what I get out of them. Worst case is I switch to a different bullet after three trip to the prairie dog town, because that will be all it takes to use the 250 bullets I ordered.

By the way here is a good article on the twist rates with the win .243 and the old Rem 6mm and why the .243 won out. http://www.outdoorlife.com/outdoor/s...540468,00.html