I had the same question...since the .45 ACP headspaces on the case mouth how can a .45 ACP be safely fired in a Roland chamber. This would be like trying to shoot a 9mm in a 9x23 Winchester chamber.
Anyone here shoot a .45 Super? Same size case as the ACP but thicker brass.
Bob
The case hangs on the extractor, as do most all 45acp cases.
