My last can was the Ecocore 30 cal titanium, I now run it on all my ar's and it definitely makes a difference, and seems as quiet as my old Sico harvester so I'm happy with it. What I've noticed with larger cartridges with the baffle cans I have, is the first shot isn't too bad but the back pressure builds for a 2nd and 3rd shot fired in fairly quick succession, like when firing a group. With the Ecocore, that's no longer the case.
And yes flowj, I love 8208 but it's terrible for staining. I even had a couple times in my 6x6.8 on somewhat damp nights where a glob of goo built up in the shoulder area of the chamber where a round wouldn't even chamber until cleaned. That was years ago and I never did figure out what was going on.