Quote Originally Posted by Bimmer View Post
If you're looking at a hyper-velocity round like 6.5CM (or .243, or whatever), then you're giving up a lot of oomph (and creating a lot of blast) by cutting the barrel short.
I'd say 6.5PRC is the hyper-velocity round you're looking for. 6.5CM is about the same velocity as .308, but uses a much more efficient bullet (typically). I have a 16" 6.5CM AR308 with a 1-6x scope and it works very, very well out to 600 yards.

https://rifleshooter.com/2019/03/6-5...velocity-2019/