Final Vel: 582 Energy (ft/lbs): 2.45 Energy Density (ft / lbs /sq in): 184.8 Gel Penetration: 1.72
TSS #9 (447 pellets)
@ 60 yards:
Final Vel: 577 Energy (ft/lbs): 0.90 Energy Density (ft / lbs /sq in): 179.6 Gel Penetration: 1.67
Contemplating these numbers will lead you down all sorts of paths regarding the relative merits of TSS. You can make of these what you'd like, but here is one take:
Individual #9 TSS and #4 chilled lead pellets are as above @ 60 yards in terms of lethality. The density of TSS allows you to have 267% more pellets per shot charge, or to shoot lighter/faster charges (increasing energy), or both, or duplexing with steel loads, or, or or ...
I like 267% more pellets. More pellets = more dead.