« Reply #6 on: August 06, 2021, 04:12:46 PM »
This reply is late by over 8 years.
For some reason I can’t get pics to post from my iPad and that’s what I have to use.
The under lug on the Huntsman barrels have the recess for a extractor you just need a small file to reach in there and clean it up and I use a spring powered extractor. The only barrels I use for the 50-70 conversion are the ones threaded for the 7/8-20 thread breech plug. I remove the breech plug and use a piece of a rifle barrel ( 4140 ) and turn and thread it 7/8- 20 on the OD.
The front mating surface is just faced off flat and I pre bore the center of the new breech plug so the 50-70 reamer has little to cut and the pilot on the reamer will reach into the bore. Once it is dry fit and everything is good I degrease everything good and epoxy the breech plug into the barrel. Once the breech face is cut flush I ream the new chamber , the 50-70 case is 1 3/4” long and the joint where the breech plug butts up to the barrel is approximately 1 1/4” in so there is never any gas pressure against the joint since the brass is a 1/2” longer . When you look at the fired brass there is absolutely no line or any indication there is a joint in the chamber so it works perfectly. I also did several CVA Apex stainless steel 50 cal. Muzzleloader barrels into 50-70’s.
jedman
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Current handi family, 24 ga./ 58 cal ,50-70, 45 smokeless MZ, 44 belted bodeen, 44 mag,.375 H&R (wildcat),375 Win.,357 max, .340 MF ( wildcat ), 8 mm Lebel, 8x57, .303 British, 270 x 57 R,(wildcat) 256 Win Mag, 2 x 243 Win,2 x 223 Rem. 7-30 Waters &20ga.,