Would think 6.8 would work well, as would X39. And Grendel. Probably not a hill of beans difference between em.

Though anyone that thinks the 223 is lacking when running TTSX bullets needs to rethink it all.

We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....