Okay, I loaded up 22 rounds of 300 grain CT Fail Safe moly coated bullets. Using my Nosler #3 guide and IMR 7828 powder, the recommended charge is 110 - 114 grains with the max load listed as the most accurate for their 300 grain partition. I chose a middle of the road charge of 112.5 grains...
http://www.accuratereloading.com/375wby.html
Greg,
This has some of the best information that I've found on the 375 Wby. Barnes has some reloading data for their bullets as well. I have a Mark V in 375 h&h that I'd like to rechamber (in fact I already have reloading dies for it). Would...