Have reloaded aluminum .45 cases up to 5 times . Some of 'em useta be Berdan primed but all I've picked up lately are Boxer small primer.
.45ACP is low pressure anyway, and I just use H&G 68 BB . Just have to go slooow when belling 'em . Many times get a small split on 4th or 5th load, still shoot OK though, then they get recycled . Great for any occasion you don't want to bother picking up cases, they were free anyway !