You can use the roll crimp in the seater die. Just don't crimp very far. You only need enough so the inside edge of the case mouth just digs a little bit into the bullet so that recoil of the front of the magazine housing and bumping up the feed ramp can't push the bullet deeper into the case.
Put a case in the seater and turn the die body down until you feel it stop against the case mouth. Turn it in maybe another eighth of a turn. Lock it in place. Run a loaded round up in and see how it looks. The original flare from the expander should be gone. The OD of the case mouth should not be below .467" with your tallest case unless you seat the bullet out enough to headspace on the bullet before the case mouth gets to the throat. If you do that (second from right in image below), you can crimp in as much as you want because the bullet keeps the case mouth out of the throat. The old time target shooters found that most accurate. You may have to play with how deep the die body is turned in to get the right amount of crimp?
Once you have the crimp, with the round up in the die, run the seater back down until it makes firm contact with the bullet, and tighten it again.
Downsides of using the roll crimp are shorter case life (necks split sooner) and some tendency to shave a lead ring off the bullet with the case mouth. This needs to be removed from the round with a dental pick or a large safety pin to minimize chamber leading.
You can also buy a
Lee Factory Crimp Die. In .45 ACP it will give you a taper crimp and also an outside finished round sizing job to guarantee feeding.