I am getting hooked on pp bullets and bought a dual diameter mold from Accuratemolds and paper from BACO.  I have been trying this in my 40-70 SS Hepburn and now I am thinking of screwing my match quality 40-65 barrel into one of my Hiwalls and trying it in that barrel.  I need to do a chamber cast but I know that the bore on that barrel is 0.410 where my Hepburn is 0.4085.  Is there a readily available paper that is a tad thicker than the 0.015 Baco paper I could try before I invest in a second mold?  Will I be asking for trouble to use a triple wrap?  Now that the range is back open I have found a good duplex load with Swiss 3fffg and am going to try a few smokeless loads Friday as the rifle is intended for hunting antelope this fall and I would like a slight gain in velocity but if it doesn't work the blackpowder loads are certainly accurate enough.  The Hepburn still has problems with the primers backing out with blackpowder loads and have to cock and fire again but the smokeless loads with gg bullets have been working without problems as long as I use CCI primers.  That is one reason why I want to see what the Hiwall in 40-65 will do as you never can tell when an antelope will charge!     Tom

Bulseyetom
I'm having trouble working out why your primers in your black powder loads are backing out before the rifle has even gone off, please explain. 
Mike.

Mick, my problems with the Hepburn primers backing out and locking up the action have been cussed and discussed here on the board several times.  The chamber is cut for 0.073 thick rims and most of my brass is 0.068 so I bought some from BACO with 0.73 rims.  Still the same problem.  When I shoot some loads, the primer backs out upon firing, not before, and the action locks up as the primer is pushing against the block.  You then have to cock the rifle and fire again which seats the primer back far enough that the action opens easily and the empty cas pops out.  I have found many smokeless loads that do not have this problem but when shooting black it is about 85% of the time.  Others with Hepburns tell me they have the same problem and also fire a second time. Maybe I should replace the term fire and say cock and drop the firing pin on the already fired case stuck in the chamber from the firing pin protruding.  Tom