Available in shot size:
#4
3.05mm dia
if doing 34gram load you should get approx 28-30 cartridges per kg of bismuth
Bismuth shot for reloading shotgun shells. ... Bismuth is one of the softest of all the non-toxic alternative shot types making it very suitable for old double guns and other shotguns with fixed chokes. No other non-toxic shot performs this similar to lead.