375/.38-55 Caliber 265g FN GC
I would like to try the above cast bullet by Beartooth with IMR 3031 in my 38-55 anyone have any idea what alloy is used in there cast or what is the BHN ?

They stabilize at about 21 BHN. Check out the second FAQ.

http://www.beartoothbullets.com/faq/index.htm

Bye
Jack