Like the experiences others have related: I've always found that seating the bullet deeper worked for me when trying to get SWC's feeding reliably in a 45 auto. Of course, you should reduce your powder charge a bit when you seat your bullets deeper. As has been stated, SWC's are difficult to get feeding nicely (but not impossible). It's no coincidence that pretty much all factory ammo for autoloaders has a friendlier shape of bullet. By minimizing flaring and crimping to make your finished cartridges have nice, straight factory-like cases, and adjusting bullet seating depth, you should be able to achieve reliable functioning.