The ammo we used at Blackwater
It was some astonishing stuff. Made by International Cartridge Corp., of Reynoldsville PA. It's made of sintered copper and tin. The 9mms weighed in at 100 grains, the ,45s at 155. We shot steel plates at 3 yards and no splash back, no jacket fragments, a couple of times I felt something touch my leg, that was it. But it shot like the devil. Todd Jarret was shooting at 6" targets at 100 yards for the heck it it, knocked one down with 8 rounds, the rest grouped a little low, but it was a tight group. At 10 yards he shoot a one-hole group. They say it's as accurate as ball and I'd believe it.
Jarret said he became a believer when the inventor gave a little demo. He took an H&K subgun, held the muzzle 1-2" from a steel plate, and burned thru an entire magazine at full auto. All that he felt was a sort of draft from the muzzle gasses, and a cloud of copper dust. The company rep said they're now making hollow point. The key is that you can control the behavior by controlling pressure and heat, and made the bottom of the bullet behave differently from the tip. Because it's all copper and a little tin, there's no worry about EPA getting on a range's back over lead, and if you vacuum up the copper and tin they have scrap value.