The next step will be to outlaw gun powder due to quail and pheasant dieing of powder burns. 
These expensive hi-tech non-toxic replacements do have their drawbacks, besides just their very high cost ( often as high as $2 a shell or even more ).
I tried using the Hevishot brand of non-toxic shotgun shells on a Chukar hunt ( Chukar is sort of a large quail, native to Pakistan, but now living wild in many western states ) once, due to all the hype about how powerful it is.
Well, this tungsten-nickel alloy shot is actually way heavier than lead, so it penetrated much more and did a lot more damage to the bird. Plus, the shot was so hard that it made the pellet pattern far more tight and dense than normal, even though I had an open Improved Cylinder choke installed in my Beretta shotgun.
I had a chukar flush at my feet, and I actually held off shooting for awhile, to allow for some distance to open up between us. But when I fired, the Hevishot pattern was so dense, it literally destroyed the bird. The head and legs were actually blown off. The only recognizable part left of the bird was its tail, which was still intact. But all that the tail was still attached to was a gooey mess.
http://s154.photobucket.com/albums/s272/lanceJOregon/hunting/?action=view¤t=chukar_email2.jpAnyway, I was unhappy with the way that this ammo performed. We simply had to throw what little was left of the bird away.
Unfortunately, our bird guide could not stop laughing when he saw what I had done. He told me that he had never seen a client do anything like that before. I was really embarassed.

Lead still remains the best material to use when making bullets or pellets.
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