Just FYI, crimp in an autoloading round can be critical as well... primarily because the round headspaces on the case mouth. Case length can factor in here, too, but I've never had a problem with case length in the .45ACP... and in fact have never trimmed a .45 case in my life. Having said that, and reading that you are coming off revolver cartridges, I would investigate a taper crimp die for your .45ACP. A roll crimp, most likely built into your seat die, will work, certainly, but too much roll crimp could possibly give you ignition problems, among other things.
Looking at your second photo, of your loaded round, it almost looks like the case mouth is still flared out (it may be the lighting or something else.)