melted the lead out of .45 jhp's, replaced
it with epoxy, and the slugs weighed 60 grs. Until got them over 1700 fps, they wouldn't reliably cycle the slide of a spld ultra compact. Too light, not enough friction in the bore. like 13 grs of Bullseye was used.
With bullets cast out of "non lead" solder (95% tin, 5% antimony) however, you can use the Lee size die ( in a reloading press) and Lee's liquid bullet lube, and size the bullets .002" over groove diameter. By hollowbasing them, you create a better seal in the bore, ability to "squeeze down" in the bore, and more powder room. If such alloy is used with a 155 gr Lee swc mold, you get a 100 gr cast bullet. Hollowpointing it reduces the wt by about 4 grs, and so does deepening the grease groove in the lathe, along with slitting the nose. Getting another 17 grs off, by hollowbasing the bullets, is tricky, but a 12 gr reduction is not.
Bullseye seems to be the powder, and the .060" longer case of the .460 Rowland lets you burn enough more powder to be noticably more effective.