I'm in the process of building a new long range plinker/Varminter/antelope/deer rifle. The conundrum I'm in is I'm hung up on calibre selection. I know I'm going to build this rifle in 6mm. I'm utilizing a Remington 700 SA. I plan on shooting 115's or 105's. I'm very interested in the 243 Ackley but I'm also open to the 6mm Creedmoor and the 6x47 Lapua. Looking for opinions.