Yes, did that with the 74 Sharps, 45-110. Worked, but didn`t see the need for the extra fooling around, as some would not seat flat on top of the powder. Try it.
Eventually had a 405grn. PP mold made, PPing solved some problems, created some others.
I think the best load I`d developed was a duplex, smokeless and Black, shooting a 405 grn PP "express" load. Safe in my rifle, and used it only for hunting.
