The test wasn't my rifle it's only a 20" I believe he took the test from a 24 or 26 in barrel. I know it was chrono tested though.

I do appreciate all the help and information it's very helpful. I've been shooting all my life a d have gone out to 1000 yds with some earlier rifles and have done 600yd law enforcement competitions the level of skill is no problem. I have never reloaded however. I did want to get into it as I know it's the only way to get great groups out of a good rifle. Do you think 168 gr is to light in a 20in barrel? I will grab those rounds and test this weekend.