It will work, but make sure the neck diameter of a loaded round is smaller than the neck diameter of a fired case.
You don't want to chamber a pipe bomb.
I think the risk of that, esp with cast bullets, is pretty close to nil, without doing something intensely stupid which would have caused a blow-up even with properly sized bullets. Y'know, like filling the case with pistol powder, or such foolishness.
In the real world, Ruger happily uses undersized barrels for several of their guns, and nobody much seems to find that it makes a whit of difference. FWIW, the mainstay of the effort of theirs, is the use of .308 barrels in 7.62x39.
Pre-internet, there were a large number of real world destructive tests done to see what would happen if... The end result of most of them, besides the destruction of firearms due to extreme measures being taken, was, not much.
Worth reading through the old writers, Hatcher, Ackley, etc., as well as several of the pre-Lawyered-up magazine writers. They did many things that we would t face value consider foolish or stupid, but they found out a lot that would have been theorized to result in far different results. They went to extremes to see what, if anything, would happen driving a far oversized bullet down a bore, reaming out the chambers to progressively larger sizes on the same bore, as well as loading progressively larger hotter loads of faster powders, in actual efforts to create a blow-up. Good reading, and well worth keeping in mind while being warned about the 'danger'.
If it'll chamber, it'll shoot. Whether it'll chamber is going to be the factor to check upon, so load one or two into cases to see if they will fit at all, before loading a whack of them. Whether well or not, would remain to be seen. One of the cheap Lee push through dies may be a good investment.
With moderate loads, I wouldn't be worried at all.
Cheers
Trev
