Yes and yes. Depending on the choice of powder, it is possible to double charge and in some powders, nearly triple charge the .45 ACP case.
You double charge a .45 ACP round, you’re gonna have a bad time. You triple charge a case, you’re gonna have a worse time. Even in a 1911.
I dont reload. but the 45 acp seems pretty low risk.
I would be very cautious reloading something like .308
There is a lot of potential for kabooey with a hot cartridge like that.