I recently tried shooting some broadheads through an Elk(3yr old cow) shoulder blade with 3 inchs of foam in front of it...and target behind.

I tried both Wasp Hammer SST (125gr) and Phantom 4 blade (125Gr).

Both heads blasted right through and penetrated 12 inchs into foam on other side...both held up ok.

The wasp has thinner sharper blades but they didn't hold the edge as good as the Phantoms.

I plan on testing some broadheads on Moose shoulder blades next year as I know a butcher that gets about 10-15 in each fall to cut up.