Search:

There was an article in the now defunct guns and hunting digital magazine comparing three 22 wmr semis, it had photos of that yellow stuff which is partially burnt powder. All three rifles had it in...

Common with 22Wmr and also 22lr worst in semis as the action opens while still pressure in the barrel blowing the unburnt stuff backwards.
The supressor won't be influencing it. It's suprisingly...