Buy roll crimping this caliber you will be forcing HS to be off the extractor. IF you extractor is properly tuned it will hold the rim against the firing pin allowing for ignition. If its not or is loose, it will allow the case to move with the FP hit likely causing miss fires. So many things will suffer. Missfires, inconsistent accuracy and hi pressures could result. High pressures can result if that case is allowed to move forward and still fire. The chamber will not have sufficient room to allow the brass to let the bullet go and a dangerous pressure spike will result.
All ACP dies are taper crimp. There is no good reason to roll crimp one, you just don't need to do this. If you want to shoot these bullets, go ahead and do so. Just taper crimp as you SHOULD with a ACP caliber. If the cannalure falls such that it is under the mouth of the case you shouldn't crimp them. But if you feel you must, its likely you can adjust the OAL enough to make them work.
The bottom line is there really is no reason to recreate the wheel here, there are many good bullets designed for the 45ACP.
CW
