Originally Posted by reddog81

It sounds like you're bullets are way to small or the sizing die is not doing it's job. If you expand the case too much usually it flares the case mouth so much that it's impossible to get the brass into the seating die.

I doubt its not enough crimp. Not enough crimp can sometimes prevent a bullet from chambering completely. Too much crimp can create a situation where the bullet is loose because the brass springs back and the copper/lead of the bullet does not.

If your bullets are falling apart on the feed ramp I'd start at square one and make sure every die being used is the appropriate die and redo the setup of each die.