Density of the lead alloy that is made into lead shot:

0% Sb 11.35 g/cc
2% Sb 11.18 g/cc
4% Sb 11.03 g/cc
5% Sb 10.95 g/cc
6% Sb 10.88 g/cc

The density of antimony (Sb) is 6.7 g/cc


"The price of good shotgunnery is constant practice" - Fred Kimble