I have several of those NAA good gadgets. About 12 years ago,I gave a demonstration to the officers in my squad on how effective the 22 mag round was in a NAA PUG with a 1" bbl.
I filled a plastic gallon milk jug with warm water and we went out to the salt/sand shed and I put the jug in the base of a sand bank and putting the muzzle of the OUG about a foot away touched off one of the CCI hollow point magnum rounds.
Instant shower!!! Blew the jug to smithereens!

According to Bill Jordan in his book No Second Place Winner he gives the 22 mag round high praise.

Wayne