Re: 2900 Fps .308?
When I first saw this thread I rolled my eyes and thought yeah right.
After working with the 26" Hart barrel my eyes are a bit more opened up. Now I didnt run very many 168's but using factory federal gold medal match ammo the reading were just under 2800 FPS and the brass and primers looked good. Extraction was easy as well.
Now like I said, I didnt really work much with the 168's but I was able to run the 178's at just over 2800 FPS with no loose primer pockets, no no primer cratering and no ejection marks as well as easy extraction. The same was true of the 190 VLD's at 2750. So it would be logical to conclude that it if I can run over 2800 with the 178's, one could run 2900 with the 168's. I am also not talking about running extra powder either, I am talking about published loads. It just seems as if the barrel delivers more velocity.
Now for the catch. I have not been able to run the high velocities with any real accuracy and certainly no repeatable accuracy. Maybe its my barrel or maybe it is that the 308 is happiest at traditional 308 velocities so that is where I have ended up. If I want 300WSM velocities, I will break out the 300WSM.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.