I too am interested in a lightweight 338 for my WBY RPM. Based on other's recommendations, I loaded up the 225SH @ 2626fps. I didn't get a chance to put it in a large animal this fall, but did take a blacktail buck in SE AK. Shot was hard quartering to at about 60 yards. The results were devastating, and I ended up loosing the entire front shoulder. I like that weight class for the large animals around here, but I wouldn't mind a lighter, faster option for lower 48 game and deer.