If you are having problems with the fired casing ejecting your problem isn't crimping or OAL related. What powder charge are you using?
Also the 45acp for semi-autos uses a taper crimp and it will work just fine with bullets not sporting a cannelure. Quite honestly you don't need all that much crimp though anyway. If you were to crimp one then pull the bullet you shouldn't see anything more than a small line across the bullet.
New gun, same ol' shot.