Does it happen like this:
You raise ram, decap/size, lower ram.
When shell plate is advancing the shell to station #2, the plate "hangs up" and won't advance, because the primer didn't completely drop out.
If so, it happens to me occasionally. Here's some things to minimize it.
- Make sure your decap pin is tight inside the die, and it's not slowly riding up.
- Hornady's recommendations for the height of the decap pin is a little to conservative in my opinion. Set it as low as you can, without it banging into the pin's collar.
- Make sure the shell plate is tightened down.
- Every few hundred rounds, clean the hole & top of the spent tube with a qtip... make sure there's no powder or grime around the rim.
Finally, I have one of those cheap Radio Shack jeweler's screw drivers handy... the tiniest one in the box. If it binds, i push it through the flash hole until the primer drops. Some cases are just tighter than others and really want to hold on to the primer.
I also use a metal container to catch them. When I'm reloading, I listen for the "ping" when the primer goes into the can. Don't reload as fast as you can pull the handle... if it DOES bind up on a primer, you don't want to be slamming it along and damage something.
Hope that helps.
thorn