roundball said:Just a thought about the whole "non-traditional" thing...since you can't use traditional lead balls where you want to hunt, and are having to look at "non-traditional" projectiles anyway.
So why not consider some of the existing copper bullets for muzzleloaders made by a few different companies now...Barnes being one of them and some other brands too.
Just poke around the muzzleloading sections of Websites / Catalogs like Cabelas, MidwayUSA, and the like...you see several caliber size choice ready to go.
I know we want to use traditional PRBs...but once you step across the line and try to make a Bismuth type ball work, traditional is gone. We had to give that up for waterfowl hunting long ago too...and a variety of non-toxic types of shot are now used...all non-traditional.
Hatchet Jaque said:I've seen the copper bullets, but my GPR has a slow-twist 1 in 60" barrel and the consensus is that the bullets need a fast-twist barrel to be accurate.
Birdshot is normally 3% tin, but a lot of the early production had problems with quality control, both in low-alloy batches, and in purity of the bismuth (embritling contaminants). Good production practices nowadays produce shot much less brittle than the residual reputation of the early stuff, and folks that drip their own seem to mostly go up to 5% alloy. I recall an online discussion from someone a number of years ago who had experimented with bismuth-tin alloy balls, and recall that he said that he had to go to a much higher alloy to overcome fracturing in rifle balls - I faintly recall maybe 30%, but it could have been higher. Remember, the higher the tin content, the lower the density.Cap Smacker said:Rotometals has some low melt alloys that are lead free (40% bismuth-60%tin / 58% bismuth-42% tin)ive been toying with the idea of casting some RB with either of these just to see how they'd work. only thing that concerned me was the low melting point aspect of it. i have no experience with tin or bismuth, so im not sure what kind of hardness you would end up with in the finished RB's. :idunno:
roundball said:...or get a .58cal...which is not necessarily a bad thing....