arnie, the BACO bullet i'm working with is the JM393425 (it's not listed in their catalog, it's slight custom made for me, a blown out 392) that drops at 422 grains with 1:20 alloy and is 1.391" in length and wraps to .395" with fidelity 9# onion. the pedi sharps 30" heavy barrel is stated to be a 16" twist but my testing shows it to be slightly under that at 15.75". i haven't shot this bullet/cartridge build beyond 300 yards and at that distance all paper holes are round, but no testing has been done yet at the longer 600 yards that it'll be required to reach out to come this fall at the bptr matches. much to do.