While I agree with all of this information, it has no bearing on a short, light mountain rifle.
It has on the rifles I had sighted in prior to receiving the suppressors. By about .4 to .8MIL.
I have several rifles that will never see a shot go down the barrel without a suppressor attached.
As for "performance", I never go with raw speed as my defining criteria. Fornlong range, I need the most accurate load the rifle will shoot. If that happens to be at the top end, fantastic. If it is 100fps or more off max, but shoots in the .2s vs .7s, give me the small group every time. There is a BIG difference between a 2" capable rifle @ 1000 vs a 7" in the same conditions. 100fps is not that big of a deal compared to the accuracy potention. To me, THAT is where "performance" is key.
All that being said, I only have one 20" barrel vs seven 26" barrels. Four 22" and three 24" in between.
I have a 20" and a 26" in the exact same chambering, 6.5SS. 118 to 125fps difference with the exact same load tested numerous times with various loads. But they are not set up to shoot the same loads now. 26" shoots a 26gr heavier bullet (156 Elite @ 3036fps) at only 40fps less velocity than the 20" (130 OTM @ 3076fps). The 20" shoots the exact same 156 load at 2916fps. And vice versa, the 26" shoots the 130 OTM load at 3195fps. Neither of these loads are near max either. Just where they shoot best. Both are around 80fps below max using stable powders. I could step on the gas w. RL26 in both and gain another 100+fps, but again, I want "performance". Which to me is temp stability across 100°+ of possible hunting/shooting temperatures. The cool burning, and clean burning are an added bonus.