Hello all, I'm new here and thought I'd say hi. Longtime double shotgun guy who is just getting into DRs. Current project is a Boss .410 made in 1874 (so says Boss, although their records are sorely lacking for this particular rifle.) Barrel-wise, it has Henry's Patent rifling which is still pretty damn crisp with some pitting, but not bad. The exterior is rough enough that I won't mind hunting with it. The locks are fantastic, as might be expected. My 'smith says the barrels are in good shape despite the cosmetics--so I'm am currently attempting to work up a BP load for it. Without further info from Boss as to what they used to regulated it, does anyone have a suggestion for a starting point regarding bullet weight and powder charge? Bore is .410, groove is .429, or close--with seven lands/grooves, it's tough for me to measure. I have cerro casts of the chambers and first couple inches of bore. I will likely use all-brass .410 cases trimmed to 2.22", since that works best dimensionally, unless someone has a strong opinion otherwise. I would prefer not to paper patch, but will if it's the only way to get hunting accuracy.

Took a bit of doing to get registered, but I'm glad to be here.