I've tried SWR Spectre II & TBAC 22TD on my converted 40X & XB repeaters, as well as all four of my Vudoo repeaters, and none of them have shot quite as well as they do w/o a suppressor. I don't shoot suppressed in matches anymore because of that, but when a friend offered to loan his ATS to me to test with a suppressor, I found that it was fairly easy to dial the tuner to make up for the increase in group sizes caused by the mass of the can. It's no biggie to me to shoot unsuppressed, since these rifles all have 22" bbls. and so are fairly quiet with std vel ammo anyway...