Hello Der Ami,
Thanks for the reply.

With the rifle caliber on this Cape Gun being so obsolete, and with brass for it being non-existent, and because I shoot all of my collectables, I came up with a simple solution. I rented a 450 bpe reamer for $35, and reamed the 11.6x82R chamber by hand. It took less than 30 minutes, and I now had a 450 bpe chamber. All the reamer did was to remove the sweeping taper in the middle of the chamber. That amounted to only about .010". The reamer also cut the rim thickness and diameter to standard dimensions. I have 3 other 450 bpe rifles, and tons of that brass and bullets. Tomorrow I go to the range for shooting.

[Linked Image from buckstix.com]