As to testing any higher on the 175SMK DPMS 308LR
I did not see or measure any pressure signs
It felt like the buffer was hitting the end pretty hard so I stopped.
Adjustable gas block????Heavierspring?????
I did shoot 47.6 in the bolt gun for a very slight gain, less than 5 fps compared the 47.4
I have the velocity at 2825 for my O3 A3
Very easy clean up
My next range test will be to test 175SMK on top of CFE 223@ 47.3
I am delighted with what I have but always looking for better