I don't think they'd survive a 500 FPS hit from them.
One bioval from a 500 FPS rifle will go through both sides of a thick glass spaghetti sauce jar like this:
I took it apart last night.
It has improved since this review and is EASILY better built than any CA gun I've ever opened.
It is rivaling G&P in terms of quality.
I'd never expect BE to be capable of this...