Thanks for all the great info!!  It's going to help a lot!

I've been doing the same thing going through all kinds of forums and picking up bits of info here and there and putting it all into a text file.  I think I've got all the numbers I need to get started in working up some loads.

Thanks again!!

Been searching the web for 458 SOCOM reloading data and stumbled on this thread.  A question for "The_Shadow".  Where did you get those reloading data pages that you show in your photos?  Are they out of the Hornady reloading book?  Is it available online?

Also if anyone else knows some good sources for 458 SOCOM reloading data it would be much appreciated!

Thanks!