Nice shooting, Blacktail
The best group my 338 gets is with sierra 215gr bullets. 73gr of IMR 4831 puts 5 rounds in around an inch to inch and a quarter with great consistency. Although it groups Hornady 225's just under 2", happily it also has the same point of impact as the nosler 225 partitions. Makes great practice loads with the same point of impact for the noslers as hunting loads.
I like my 338wm, although will admit before I changed out the factory recoil pad (read: brick made of indian rubber), it happily kicked the cr*p out of me. Found the recoil way sharper than the 375 H&H I stupidly sold.
Peace,
Narly