Re: Please Help me decide. AAC or SureFire 7.62
Everyone toots their own horn. Mostly I've found that people back the cans they already choose with claims that they are the quietest, tightest, have the least POI shift, etc. Think about it. You've just spent upwards of a grand (ore more for titanium) plus a mount and machining maybe, plus $200 tax, gotten a runaround for fingerprints or a trust, then waited 6 months for the transfer to come through.
Of COURSE your XYZ can is the best.
Keep in mind when reviewing silencer tests, a 3 dBa change doubles or halves the actual sound pressure. This is true of audio in general,not just with cans.
POI shift can have as much to do with how well your gun is threaded and crowned as the can itself.
I started with a TL Gun 5.56mm 6" "Smidget" and it's served me well for over 10 years. Got a .22 LR can from TL too,then a .45 can for a MAC-10. Couple years ago I bought an SRT Shadow on a Rem 700 PSS. I have less than a 1/4 MOA POI shift with or without the can and it's predictable (lower right hand side of the target). Also own four AAC cans, as I picked an AAC M4-1000 to swap between an AR carbine and Rem 700 LTR and a Cyclone. Can't tell the difference between the cyclone or the Shadow in .308 and I've asked friends to try, too, by swapping out the two cans during shoots. Just recently picked up an AAC 7.62-SDN-QD and have it mounted on a DPMS REPR. Same results as between the cyclone and the shadow according to the same group of folks.
I'm opening myself up to a shitstorm here from the dealers and testers, but keep in mind, the results YOU get in the field are going to depend on your perceptions, your terrain (you shooting in tree-lined range or open desert?), density altitude, velocity (a subsonic round is WAY more quiet than a high-velocity round). The job of the can is to limit the "boom" while the sonic "crack" is always going to be there regardless. Some cans do this a little better than others, and at less expense.
Personally, if I was doing it "all over again" I'd probably start with AAC in .308, the QD model, maybe a .338 Titanium can for versatility (('m about to buy one for a bolt gun I shoot).
If you can link up with people who shoot with cans it'll give you a better feel for what you're getting into, but it's not like we advertise. Well, not outside the 'hide anyway.
Have fun. Shoot, shoot often, and bring a friend.