Suggest a separate priming operation, or set your equipment up to provide maximum primer seating force. Nothing is more annoying than a primer half way in binding a progressive loader up.

The boys at Airport Gun Club in Lancaster, Ohio use and reload RIO shells in all gauges and report good results. They sell RIO primers, and might be able to help you with loading data.

There should be 1200 primers in each brick, so that's good...

"The price of good shotgunnery is constant practice" - Fred Kimble