MrYeats
The only time I've done this is with 44-40, where the brass is so thin that breathing on it wrinkles it. By the way, if you believe that, I have this bridge ... .
Sounds like you are shooting all bolt actions, so I'd suggest that you set your seating dies to seat the bullet without crimping at all. When you get your gun, take an empty case and slightly seat a bullet in the case. Load this and slowly close the bolt, letting the rifling seat the bullet. You will probably want your OAL a few thousands less than the OAL of this cartridge to prevent pressure problems, and you can experiment with seating depth once you have found your accurate load. It can affect accuracy, but your most accurate load will be your first variable to find.
Are you chamfering your cases? This is cutting the mouth of the case so that it is almost sharp, allowing the bullet to slip in. Otherwise, the bullet will catch on the mouth of the case as you try to seat it, as it is the same size as the case mouth. My experience is that if this is the problem you will successfully load some rounds and some you will crush the neck down onto the shoulder, not just get wrinkles.
If you seat the bullets this way, with no crimp, with a chamfer, and are still getting the wrinkles, your sizing die is way too tight or the expanding plug is way to small. This is reason to return the die, by the way. No way I would keep it and try to fix it, let the manufacturer do that.