[OH Osthaus]

a couple guys mentioned using them a while back

http://parkerguns.org/forums/showthr...hlight=bismuth

for pressure- i would think you would need to either contact them or send a few to Tom Roster for testing


note the ad says for classic guns

http://www.rioammo.com/images/bismuth_classic_comp.jpg

but the specs say MAX for dram equiv

http://www.rioammo.com/rio_bismuth.html