The rimmed case would cause a lot of feeding hassles, and the different loading levels would cause some hassles with certain, reliable operations, and the high useage of cast bullets would cause it to choke up the gas operations, too.
The .357 has been in use a long time, and lots of shooters are devoted to their cast bullets, and that would raise hobb with the thing. The Desert Eagle pistols are frequently returned for repair after someone doesn't read the instructions and uses cast bullets in it. They are literally soldered shut when used with cast bullets. Add to that, getting reliable feeding from all the different nose shapes (mostly flat ones, at that) would be a nightmare, too.
All in all, it would be a stupid idea, kinda like a Desert Eagle.
i cant follow that logic...
glocks are not supposed to be shot w/ lead bullets and people who own them know that.
I think that 357 shooters who prefer cast loads probably wouldnt be drawn to that style of rifle and if were they would know better than to shoot cast thru it.
besides, what would preclude it from being a blow back semi?
for that matter a tube fed blowback.
besides isnt the 44 mag a rimmed cartrige? theres a semi auto deerfield that figured out how to make that feed and function fine even though many shooters use lead 44's.
the model.
the MP5 is roller delayed, right? i dont think many people would say it has a function problem.