I did notice that I seem to group tighter with the 18 inch barrel vs one of the 16 inchers at 20 yards.
Could be the .03 rear aperture tho.
I really need to get out & do some testing with & without the Brake & compare to one of the stock S9s.
I did find that the Brake does reduce recoil. About the difference between 115 & 124 grain rounds. The clamp on HighPoint Brake has to be tightened pretty often & seems to move back under recoil.
Wonder how many of these are still StateSide.