RE: .260 Remington for deer?
A couple of my customers use the .260 for tactical/sniper matches and swear by it. You might visit AR15.com forum and do a search. Zak Smith and Michael Aos are both doing quite well with the .260 Remington. I believe that Jim Clark Jr. also used the .260. Light recoil, great accuracy, wonderful long range ballistics . . . . . there is a lot to like here.