With optimum Bismuth ( so far) being 6% tin alloy at 9.6 g/cc the 30% that's added to these steel shot loads .......is a joke ! The true value of a denser payload is to have a greater amount of the payload still in a working pattern at the maximum distance of the pellets ability . Why shoot something that 70% of its pattern will fail way before what the shell was purchased for ? Plain old round steel shot , in the proper shot size , will perform to your expectations without Drinking the Kool Aid of Marketing . If you need more Density in a pellet , it comes in the next price range , you can't substitute pattern performance without pattern density !