I used to work at a gun store and range. We would burn the targets in a barrel out back. Once time, a .22lr dud was tossed in and one dude got a weak shot of unsupported .22lr in the crotch through a 55gal steel barrel.

YMMV, but even “weak” rounds can ruin your whole week.

Sintered printed guns with conventionally manufactured barrels/breeches or I ain’t fucking with it.