The 1st TBAC I bought was a 30BA that saw a lot of use on a DTA SRS that I'd done bbls in 6x47 Lapua & straight 284 for. The BA brake was an ugly sucker, but I guess it didn't look too out-of-place on a rifle like the SRS.. Anyway, I had just got my form 4 & stamp for the 30BA back from ATF when TBAC announced the new line of CB suppressors, so I ordered a 30CB9...had just received form 4 & stamp for it when they brought out the Ultra line - you see a pattern developing here? Anyway, I liked the Ultra 7 so much that my older BA & CB cans were just sitting in the safe - unloved & unused. When TBAC announced the Ultra re-core program, I sent the 30BA off to them. Got it back in just less than 3 weeks, and started playing with it to compare to the Ultra 7. No question that the Ultra baffle stack made the old 30BA into a new, much lighter & quieter can. I shoot a BR Varmint Silhouette match with a BAT 3L 6 Dasher in a Shehane Tracker stock, on a covered firing line. I used to have a Vias radial brake on this rifle, which was almost painful to shoot on that covered line. Switched to using the Ultra 9, and could not believe how much more pleasant it was - I could actually see my impacts because I wasn't blinking from the muzzle blast of the Vais brake. This past spring, I took this rifle down to my range and compared the groups it produced with both the Ultra 7 & Ultra 9, and found that it shoots quite a bit better with the lighter Ultra 7. Was a little surprised the weight made that much difference since it's a heavy Palma contour bbl, but subsequent testing on a couple of other rifles showed similar results. I may try a new Dominus sometime down the road, but am a little tired of chasing the 'latest/greatest' cans, especially since I'm so pleased with what I've got. In fact, I'm so pleased with the Ultra 7 that I'm thinking of ordering one with the 6.5mm aperture.