"IF" the gun blows up from being over pressured it'll blow at the chamber where the walls are thickest, not out where they're the thinnest. Walls of .022 out in the forward third of the bbls will not take as much of a bump without denting as thicker ones bt they aren't going to blow-up unless they have some other problem. In fact most smokeless loads will not stress them out there to quite the extent the original black powder loads did.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra