The AAC Mk13 would work. The 762SD-N6 is only good up to 7.62NATO, not 300WM.

I wouldn't worry about "user serviceable." Centerfire ammo is pretty clean, so you shouldn't see a lot of fouling like you do in rimfire cans.

  I thought all cans that size were welded. You should be able to clean them with a WD40 or Kroil soak.

Mountain Dew 2L bottle, a ton of steel wool, and duct tape.

 

I would get a precision can for the bolt guns. The multi use cans out there don't preform well on very accurate rifles.

There is no need for a centerfire rifle can to come apart.

There is precision and then is good enough. Choice is yours. I know that when I take one of my rifles out and take the first shot of the day at a 12" plate at 850 yards I like knowing that my system is as repeatable as I can make it. I have not seen that level of repeatability in any of the QD systems out there right now. I compete in and run some of the best precision matches out there. I've only seen QD mounts used on carbines in our comps never on the precision rifle.
I'm pretty fortunate that I earn a living in the precision rifle world. I want a QD mount I'm willing to put on my match rifle. We are working on a few ideas now but many months of testing to come. I need a mount to be super repeatable so I can make that first shot of the day knowing that if I make the right wind call and get a good pull I'll score a hit.
 We came up with our BA model for the PSR submission rifles. The guys at Barrett were like little kids sending me pictures of groups they were shooting taking the 338BA on and off between rounds. Like I said I think QDs are fine for battle rifles but not ready for MY precision rifle. We are working hard on changing that.
I want my cans to have welded cores and end caps for greater repeatability and overall strength. I've got more rounds through my prototype 30P-1 than most will shoot in their lives and it's never been cleaned. It's spent a lot of time on my 7 WSM and 260 match rifles before I started testing the 30BA on my 260 match rifle. I typically shoot out at least 2 barrels a year with it.
I guess it comes down to what you really expect out of your gear. There is a reason we don't see QD mounts showing up in the comps at all. Thread over brake mounts like our BA model work very well but are not QD.
It's hard to get one can to do everything well from bolt guns to battle rifles while keeping suppression, durability, weight , size, accuracy and repeatability all in check.

Just my $.02 bro

Now I'm off to go test some cans today