Re: Shooting Rifle Cans Wet
Great question and chucky is right.
The short answer would be no, though as chucky points out there are exceptions, almost always in .223 only.
It is very rare to find centerfire rifle length cartridge cans that are designed to use ablatives. Sub gun with pistol cartridges, for many/most designs, yes. Though, again as chucky points out, there are exceptions like some MP-5 cans. For instance early Colt 9mm rifle suppressors were commonly "dipped" prior to entry, especially and mostly for use in highly flammable environments.
Single shots should not need them, a great can takes care of the blast component and the supersonic projectile flight signature is unaffected by ablatives. A great can, when shot with subsonics definitely will not need it as the gas volume and concussion effect is greatly reduced. Hydro lock is a great concern with high power rifle cartridges and ablatives, it gets ugly and dangerous fast.