Sizing them to your own gun as suggested will help a lot. I shoot them in my Genesis and they load very easily once started. I had a little trouble at first, but giving the short starter a firm thump gets them started.

I have re-loaded a few by pushing out loads after a hunt. These always load very easily, no ned for a starter. I think I will size a few for the season this year, as I don't like to carry the starter hunting.