According to Rule's book on the Model 70... the 338 was a mid year 1959 release...the 338 with the 25 inch bbl is an excellent big game rifle.....however, I prefer the 375


"To pick a rifle and bullet for use on game by muzzle energy alone is, at best, foolish...and can be dangerous to your own health..." Bill Steigers, April 23, 1980