BHA was nice enough to send me a electronic copy of their load data for 500 S&W, 500 Auto Max, 500 Linebaugh, 460 S&W, 454 Casull, and 475 Linebaugh. I have been testing some cast gas checked and powder coated bullets and now have some new parameters to work to. All data is for 18" barrels of the Bighorn guns. Give them a call and request an email with the info. This is as far as I know all new data, and is copyright protected, so I won't be posting any info on the web.