Thanks to all who have responded. The question of where to locate .500 NE 3" brass is still up for reply.

Many thanks,

Sam
eclemmons@hotmail.com

brass: http://www.huntingtons.com/CasesHorneber.html

or

http://www.huntingtons.com/CasesHDS-rifle.html

Big Sam,

Huntington lists 500 3" Nitro Express in their HDS brass.

web page

Obviously you can use 500 3 1/4" NE brass as well by shortening it. Midway had one box of this brass on sale at the moment.

Buffalo Arms lists brass as well. web page

Hope this helps,
Jim