You would also need to add in ALL the pellets that TSS would be hitting with. 108 #2 TSS pellets at 18 g/cc vs 9 or 10 lead 00-BUCK pellets at 11.8 g/cc. I'd like to see some type of equation
Surface area equation: A = 4 π r(squared)
Take that and divide by two to get the surface area that will be impacting the animal.
Multiply by the number of pellets to get the surface area that will be impacting the animal (theoretically).
#2 TSS comes out to 3.815
00-BUCK lead comes out to 1.710 (I used 10 pellets for this calculation)
TSS takes it by more than double that of lead. Even if 1/4 of the TSS pellets miss or hit non-critical areas, it's still an overwhelming win. The additional pellets also give a higher probability of actually hitting those critical areas and stopping the charge. Plus the higher density and smaller size of the TSS pellets will maintain energy at a greater distance than the larger, less dense lead ones.
I get it
@HankBuck, you don't like the cost. Truth is, I don't either. What I like worse is hitting game animals and watching them continue to fly/run away. With the sole reason being that I was using an inferior shell. I know this thread is about leopard, but the same principles apply.
Tell you what, go buy some Winchester Last Call #7 TSS shells to compare it with lead #2 shells...both proven killers on goose. Shoot them at a pattern board and make a video of it hitting the paper. The difference energy transfer is immediately apparent, even without using ballistic gel.