Quote Originally Posted by The Rat View Post
Don't shoot .22 out of a .223/5.56 can, the lead will build up over time. Get a dedicated .22 can that can disassemble for cleaning like the Spectre II if you want to shoot canned .22.
That said, I have shot thousands of rounds of 22 through my Shark 308 Ti can. All of it lead ammo and not copper plated ammo which in theory should be dirtier. It gained only a few grams of weight and still functioned just fine shooting full power centerfire ammo through it.

And yes I did this just because I heard all the internet chatter about how bad it is, but nobody had actually tried it and documented any of their findings.

Yes 22 ammo is dirty due to the very low pressures involved. Be smart and be sure there isnt any build up that will cause a baffle strike and you will be fine.