Suppressors Max Barrel Diameter for SF Suppressor

[saddlerocker]

So I have a legacy SF FA556-212 I use on a couple ARs.
I recently got a 223 Wylde bolt gun and mounted an MB556k adaptor to use the can. (The MB55K does not have the extra length behind the teeth like the P/N model, and the newer Socom adapters)
Its a Med Palma contour at 22".
.85" at the shoulder.

The suppressor collar only gets a few ratchet clicks on the teeth of the adapter/mount before rubbing on the barrel at 12 O'clock which appears to be what is stopping it from ratcheting further. (The collar has a wobble type axis by design when tightening. Hard to describe unless you are familiar)

I have searched for a max shoulder diameter for the new Socom and the legacy cans, but I cant seem to find anything about it.
Does anyone know if there is a max? Is it ok that I am only getting about 5 clicks on the teeth?

It has shot well and alignment is good with multiple times taking it on and off.

EDIT: I just read some mention about a new Gen2 collar that was offered on some refurbished legacy suppressors around 2019ish. I am guessing its the same as the Socom collars. Anyone know the difference?

1st picture the collar is all the way open, you can see it is centered.
2nd picture is all the way closed/locked and the collar is off center and it contacts the barrel within a few clicks on the adapter teeth.

 

[phxfa]

5 clicks is good to go,,,2? I wouldn’t. great can btw. Mine was a bright orange at big Sandy with a 10in M16,,,

 

[saddlerocker]

It seems surefire says .800" max diameter at the shoulder.
I read that in the description of some muzzle device mounts.
The MB55K I am using mates right up to the shims, unlike the flash hiders I have on ARs or the pinnable mounts that have a narrow portion behind the mounting flange on the device.

"adapter mount that enables rapid no-tools attachment of SureFire FA556K, FA556-212, FA556MG, MINI, or MICRO suppressors to the Colt Commando, M4, M16, HK 416 with 14.5″ or longer barrel, and to other 5.56mm (.223 cal.) semi-auto, bolt-action, or assault rifles with Mil-Spec 1/2-28 muzzle threads and (due to slight suppressor overlap) first .170″ of barrel behind the threads clear of obstructions and no more than .800″ in diameter"

Unfortunately my brake is like the one in the bottom picture.
I would love to find a MB556K P/N with the extension since my bolt gun is .85"