Dugaboy1 - Thanks for the reply, I hope your hunt was successful. Thank you for the 458 RCBS load specs. In your opinion do you think that using 45/120 brass in a strong modern action such as the Kodiak that a 500 grain bullet can be driven to 1900 FPS, or a 400 to 2150 FPS? I'm trying to see if I can get 4000 FPE from this classic round with modern powder. Thanks again.