I have 3 jugs of #4 Bismuth and 1 jug of # 2 I can part with. PM me if interested.

We need to get Boss shotshells on board with making some lighter pressure loads. I have asked them a few times over the years to consider it. Heard about a year ago that something was in the works but nothing since. I hear great things about their shells.

I’ve loaded bismuth in all gauges from 10 to 28 . I use the same load I use for lead in each gauge . And I load the standard weights 1 1/4 for the 10 , 1 1/8 for the 12 , ounce for the 16 , 7/8 for the 20 and 3/4 for the 28 . In the past I used to weigh each shot charge now I drop the 10-12 and 16 from the loader for the 20/28 it’s quicker to use a dipper and hand fill as coarse shot bridges terribly in the 20 and 28 drop tubes . Plus I rarely load more than a box or two of bismuth at a time .

Good points, I hadn't thot of a roll crimper, and had only recently heard of Boss. One of the subsequent posts on this thread indicates that Boss apparently doesn't load a vintage low pressure round. You're no doubt right that vintage low is a small market and probably the first thing dropped in these tough times; also the last to probably be resumed. Thanks for your help.

Mike

Wasn't aware of roll crimping reducing pressure, so that's intriguing, altho I'd have to add that new equipment to the inventory; don't roll crimp now. The smaller gauge inserts in the 20 ga is another angle I hadn't thot of, altho not sure how hard 28 ga bismuth is to find. Also, wasn't aware of Precision Reloading. AA's are straight walled, altho the base is tapered. Thanks for the ideas.

Much appreciated Mark, but I'm only needing bismuth in the small shot sizes.

Appreciate the pointers, Craig - thanks!

I have reloaded light 12 gauge loads for years, but have never reloaded Bismuth, so I am barely qualified to advise anyone on this.
That said, if you are loading based on volume, and not weight, I would think the lighter Bismuth payload should automatically be a lower pressure load than an equivalent volume of lead, everything else being equal.

Probably the best thing to do if you come up with a load that in theory should be safe is just spend the $40 or whatever it is and have Precision Reloading test them. Like if you used that bismuth data thats in the 10k psi range ideally if they were rolled crimped and used a fiber wad the pressures theoretically should drop by a noticeable degree but having them tested would give you some concrete data. As well roll crimping depth can raise or lower pressures but no one ever lists what depth they roll crimp to.

OK, helps to have a little idea of the price range and process. Never thot about the depth of the roll crimp making a difference; of course, I have not considered roll crimping before. Thx again.