Lumpy - thanks again.
jar3ds - I didn't expect it to cycle, just wondered about the barrel taking the pressure of that one shot. BTW, good thing you said MOST handguns, because I know a few that are, including a 1911 gas gun.
After checking Lumpy's reference, it appears that an AR
may take it (hope it's a bull barrel and not a superlight!). The 1903A3 fired the 30-06 without apparent barrel damage, It says the water in the barrel was equivalent to the powder having to move 2.5 times the normal bullet weight.
So assuming there were no air pockets, my guess is that you could fire the AR without a kaboom, but of course it would be a single shot. However, I wouldn't be surprised if the bolt was somewhat jammed in battery very tightly, requiring a boot stomp on the CH to open it or worse. If there was a defective part in the bolt, hidden fracture/stressed area, etc - I think you would then find out about it in short order.