Campower
New member
Im trying to decide on what grain ttsx to run in my r700 AAC sd. 20" barrel 308 1:10 twist. Its only been used as a target rifle thus far and havent tried anything under 175gr (which it shoots very well). Im torn between the 130 and 150 ttsx. The 130 should be able to be pushed very fast, but im worried that since it is such a short bullet, and remington chambers are very long that i could be wasting time and money even bothering. Let alone the fact that Barnes recomends a factory crimp on this bullet due to the short bearing surface. The 150's are a bit longer, but I wont be able to push them as fast as the 130's, which normaly wouldnt be too big of a concern, but a 20" tube presents its own challenges regarding velocity. Im using Lapua brass, CCI 200 primers, and I have Varget, IMR 4064, IMR 4895, RL-15 and CFE223 to work with for powders. Thanks for taking the time to read this rather long post. OH and im a northern Mainer, So I have black bear, whitetail, and Occasionaly Moose on the hit list.