You can get at least formable brass from Jamison. It's good brass. It's not listed, but he might make 500-.450, call and see, or get a similar one (500 - .416) and form it to yours. It seems to me he said he was going to make it.

http://www.jamisoninternational.com/Bras...w=10&page=5

I bought a Field Patent .450 - 3 1/4" last spring, and it is one of the most fun rifles I've owned in a long time. I load with 120 grains of black and 385 grain lead bullet. Nice, light recoil load about factory spec, and accurate with my rifle at 30 yards.

dave

Last edited by ssdave; 10/31/10 06:14 PM.