Thanks, Mike. BP was helpful in their reply, and alluded to what you are saying, if I understand both of you correctly.

I will most likely send 5 to Tom for testing if I decide to substitute the Cheddite primers. I have done so in the past with other loads where I substituted Cheddites for others, but this is a different powder, hull and wad combination.

Best, SRH

May God bless America and those who defend her.