John

The Nosler load is from Real Guns data pressure checked to 38-40,000 PSI while the other load is Buffalo Bores 300 grain Speer Unicore they offer in there factory loads.

http://www.realguns.com/loads/4570.htm

http://www.buffalobore.com/index.php?l=search_list&s[search]=&s[title]=Y&s[short_desc]=Y&s[full_desc]=Y&s[sku]=Y&s[match]=all&s[cid]=35

Jayco