It is not wise to try to seat and crimp a smooth sided autopistol bullet in one step.
That said, you have other problems. You cannot crimp a loose bullet tight. All a taper crimp does is remove the flare and streamline the cartridge for feeding, bullet pull is increased only slightly. Not enough if you can set the bullet back by hand.
Either your sizing die is not taking the brass down small enough or the expander is taking it back out too large, or you have some thin brass or undersize bullets. Or a combination. Going to take some troubleshooting.