Originally Posted by snowman

Yes, sir, that can cause problems.

Glad you discovered the problem. Another tip that may help you avoid problems once you get going with it: as you dispense the primer, push the trigger mechanism with your finger on the back side(side facing away from the press, toward you) rather than on the top. Also be aware that the last primer or two in the channel may not feed, due to the lack of pressure on it/them from other primers higher in the channel. I have to dispense the last two manually every time I use the thing.

Hope this helps a bit.
Andy