Jack, my reply to Dr. Bill was directly from Russ Gray about the compatability of the two. Also if you go to page 2 in the forum under Primer Substitution by Tom Armbrust, you will see that Cheddite primers are lower in velocity and low in psi. I'm also sure that in the 16 ga Reloaders group and the 16 ga. Society there is more information on primers and compatability.


David