I switched my 550B from 9mm to 45acp. When using the large primer pickup tube, about the fifth primer would block the tube. I would dump the primers and start again, usually with success. I finally changed the plastic tip and that helped but still on occasion have the problem.

When I drop the primers into the large primer magazine, the primers seem to catch at the mouth of the magazine. They don't drop smooth like the small primers.

I use Winchester large and small primers. The small pick up and drop fine but the large primers seem to catch in both the pick up and dropping process.

Thoughts and thanks....