I bought a .50 cal Huntsman barrel in the classifieds last week(thanks Garbhead! ) fits my Pardner frame perfect, so no work needed there!! I do need to make it Washington state legal, so today I worked on that, I modified the 7/8" breech plug to accept a shortened ¼"-28 #11 nipple(for now), but I didn't just drill the existing hole out, I used an 1/8" end mill offset by .050" so the firing pin, which hits dead center, would hit offcenter on the anvil part of the nipple instead of in the center of the hole in the nipple, drilled and tapped it for the ¼-28, then tested a bunch of CCI caps on it and got 100% ignition! I also called Ben Hubbard to order a ramrod, he said he'd get it right out!!
Range report some day!!
Tim
It's about time you got with the program! Congratulations on your Huntsman, they are very accurate rifles, and not very fussy about what you want to shoot out of them.
I did a "easy as pie" conversion on here a few years back, and I had not problem with the firing pin hitting dead center, but you WILL want to pay attention to the firing pin every few shots at the range. For hunting you should be ok with less than 5 shots before it would be a must. I understand that that type of conversion would not be WA friendly, but it would work in a pinch elsewhere.
I would think that the primer carrier slot would be "open to the elements" enough, but WA may think differently, I guess?
What bullet/s do you plan to shoot? Mine love saboted bullets (200 gr to 300 gr), and heavy lead (400+ gr) conicals alike. Just need to get the powder right for your application.
Good luck, and enjoy your new Huntsman.