I know it was quite awhile ago, I got a couple breech plugs from Super 91 and parts from Rattus. Don't know if He made them . Quite a few of us got them
If you need bullets you can contact BullShop at http://bullshop.weebly.com/. For your Whitetail I would recommend the 504 460 gr bullet in Pure Lead. http://bullshop.weebly.com/-50-caliber- ... llets.html. Bullshop can even size them to 504.5 if you like. I know some Whites like their bullets a little over size of the bore. If you email him, at [email protected], you could specify you'd like some at 504 and the remaining at 504.5 to see which your rifle prefers.