To reiterate regarding the crimp, auto loading cases such as the 45 ACP head space off the mouth. This means that the degree of crimp that is used, isn't actually a crimp at all, but mearly closing up the belled mouth. If the case mouth is reduced by more than .002" the mouth can get pinched which can drive pressures up unpredictably high, or worse, and it could cause FTF's.
Be safe and take some time to read about how to identify a proper crimp for ACP's. This is a very common misconception among reloaders, in that, it's often thought that the crimp on ACP's is indeed a crimp, and serves to increase or maintain neck tension. This is 100% wrong and can get a guy into trouble and destroy a firearm too. 100 % of neck tension on ACP cases is obtained from the resizing die meaning that 0% neck tension is obtained by the crimp.
Cases that head space on the rim such as revolver cases, 38 special, .357 mag. and so on, are a different story all together. Those type cartridges rely on a good roll crimp to prevent bullet jump caused by recoil and high pressures gases blowing back.
GS