Can't say I'm a fan at this point. I have 2 and generally use them on my AR in 300 BO and bolt action(s) in 300 and 556. Usually no more than a mag of aimed fire. I used them for mirage control when shooting for groups.
Today I shot a couple of magazines out of an AR in 556. 60 shots total, first 30 were aimed shots, definitely not fast or any sort of mag dump, maybe 2/3 seconds between shots. A little smoke but I figured it was burning off production material, gun oil etc...
I went inside and loaded a second mag and then did the same as before, the smoke got worse about 15 shots in and by round 20 it was smoking pretty good.
It didn't stop so I figured I'd better do something so I went inside and grabbed a silicone pot holder and removed it (sorry to my wife).
Anyway, the cover is now 'crunchy' when slightly squeezed, discolored on the ends, and slightly burnt. The can was a DD Enticer Ti (raw Ti) and to my knowledge, raw Ti starts turning colors at 600/700 degrees. There was one very small spot where it started to discolor, so in my (maybe wrong opinion) the can barely got to 600/700 degrees.
ETA: Per the info I can find, these are rated to 2,000 degrees.
However, the cover is now crunchy, some of the threads looks pretty burnt and shriveled, and although it's hard to tell, possibly burned through spots on the end of the cover. But wait, there's more...
Apparently the tags they use ARE NOT heat resistant, so now I have a nice 1x1 black carbon burnt spot on my can. I know, shoot it more, paint it, throw it down the driveway, how brave am I etc...
Am I using this cover in the wrong manner? I was under the impression these aren't made for mag dump but should be fine for some target shooting.
TLDR:
ETA: It seems more than a few of us have these, most comments state these are for (very) light use/burn protection and I agree. For those that haven't yet... if you care about your suppressors finish, cut the inside tag off, all of it. For some of us the melted tag will just be added character.
While you're at it, may as well remove the outside tag as well if you're using it in any other capacity than light duty, it will melt as well. Had my tags not melted likely I would not have posted. It doesn't make sense to me to have a '2,000 degree' capable suppressor cover but only a 500 degree tag ready to melt, but what do I know. Mechanix could at least give us some guidance on use restrictions (like most silencer makers do).