Originally Posted by davewilson
i know a fellow that probably knows as much as anyone about this stuff. he developed a very successful style of bullet and in doing so tried many different alloys. one thing i remember him saying about aluminum bullets was that they left absolutely no fouling in the barrel, even when fired at nearly 6000fps. a bullet that didn't leave anything in the barrel would be nice. maybe an aluminum skin instead of copper. just passing along what he told me, don't know if it's true or not.
another thought i've had would be to hollow out the back end of the bullet. would help with the length/weight ratio but moves the CG forward which doesn't help accuracy. just an idea i thought i'd throw out there since you're starting from scratch.
make sure your core isn't anything the EPA will ban like they're doing with lead.
I would be real careful about making Aluminum bullets. Aluminum in a pure state is very ductile, but subjected to air and the chemistries of life, it oxidizes very readily. Aluminum oxide, as you may know is what many sandpapers are made from. About 9 on a Mohs scale. On a piece of aluminum the oxide layer may be very thin, but I would think that it would not be good for any barrel. Like running 2000 grit sandpaper down your barrel every time you shoot. That is probably why it doesn't foul. The bullet sands its way down the barrel. I don't know that this would be so, but I think it is a pretty good guess.
We are specifically staying away from any materials that the EPA will frown on. We hope to be the "environmental solution".
Thanks for the input.