As Dave pointed out, you don’t have to do the mod... load the cavity with a grease and beeswax compound and bang away. Cleaning up when needed.
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Charlie Hahn did my Pedersoli Sporter. Worth every penny to me and I don't compete. I also use his cardboard tubes. The rifle is zeroed at 100 yds and I use 60 gr of 2F Swiss and a Lee Xmas tree bullet sized .544. It has a tang sight.
mabie the inerecia of firing forces it to the rear of the breach? thanks for the reply.
I also use his tubes also. but I just thought that I would like to use loose powder, just pour and go! no preparation before hand.
I think the grease works by virtue of instead of squirting dry burned BP soot out the breech and locking everything up in a few shots....the grease gets pushed out instead.
My best guess is that in some government warehouse there is an army ordinance archived document ordering Sharps equipped troops to pack the breech cavity with grease and wax....probably stored right next to the lost arc of the covenant and the holy grail
Toot, the N-SSA site recommended using Charlie Hahn's tubes. I believe you want to use loose powder
I've never tried this trick with the grease. Have to remember to do it next time out.
One thing I learned with the Pedersoli was to spray it down with aerosol canola oil when it got sticky. That kept it running for some time and made for much easier disassembly afterward.