I agree with this. I have a sandman L that I was sort of talked into for my precision rifle. I went to the dealer to order the TBAC, and he talked me into the Sandman L, I was hesitant but did it. It has absolutely zero effect on point of impact for my setup, i have it on my 6.5 Creed and it has fantastic suppression. I took a precision rifle class last year and to my left was a dude with a 300 WM, and to my rifht was a 308, they laughed every time I took a shot, because it was so freakin quiet, they wondered if my round would even make it to the 1K plate. But it did. Almost every time. Awesome can. ALSO , I purchased a Yankee Hill Turbo can for my .556 from @HansohnBrothers and it is a wicked can. I think it won suppressor of the year for 2017. It was so freakin cheap at under 400.00 was a no brainer. Call @HansohnBrothers they are straight shooters (no pun)My DeadAir Sandman S and L perform just as well as my Thunderbeast Direct thread 30P1 when it comes to POI changes...which is hardly any at all. The Sandmans are full auto rated, no barrel length restrictions, and magnum rated. And their indexing muzzle devices produce consistent and repeatable lock up.
No experience with the Surefires