Lesley--great shooting sunday, with the .308. Lesley cleaned house with a new .308 in the Tactical class. He previously cleaned house with the 6cm. The 6cm is NOT allowed in the "Tactical" class as the T/R class is designated for .223 and .308 with front bipod. If you want to shoot with a front rest or other calibers, then you're in F class/open. I don't think that 6cm is banned. There are many others who shoot 6, 6.5's, etc, in standard loadings and in wildcats. Les- great shooting again. Let's try it next time with a sling and the Mk I. eyeballs!!! LOL.