Had the same problem with my 650. Funnel looked like it had scored, upstroke was like pulling a cork out of a bottle. Powder came flying out of the case on the next station. What I did to resolve it since I use mixed brass/nickel. I removed the funnel/expander, cut a pencil (or a wooded dowel) to fit inside of the funnel, with my calipers I measure the thickness of the expander wrote it down then installed the pencil end into a drill press ( can use a hand drill) put it on a very low speed again I say low speed, take some emery cloth or polishing cloth that you can get from the hareware store. Hold against the scored part (bottom)and remove .001 or less off of it. It will remove the scoring and make it easier to go into the case and come out in one easy movement. I removed somewhere between.001-.002 off of mine and it solved the problem and it didn't remove any noticable chrome. You will have to play with those measurements. You may get away with taking off a lot less than I did. Remember go slow and take multiple measurements( so as not to remove the chrome) to see what works all the while sticking it into a couple of different cases to see if it becomes easier to remove. Good Luck. and go slow