I have a brand new hart heavy barrel 30" long, 6mm with a 1 in 8 twist. Plans are to shoot the 105 Amax or the 107 SMK. could you guys give advice on which caliber to use. I plan to mainly hunt hogs out to about 600 yds with it. I have looked at the standard 6mm and the .243 but something like 243wssm or 243AI are gaining my interest. I have a friend thats shooting a 6x284. So many choices, could you guys help me narrow it don't some? Thanks It's been a while since my last post, I'm currently serving in Iraq, would like to complete the project after I get home.