From Wikipedia, the free encyclopedia:
"This wildcat has finally been legitimized by the small A-Square loading company and Weatherby is now producing factory made rifles for the cartridge. The .338-06 is nothing more than the .30-06 case necked-up to accept .338 bullets, the same diameter used by the popular .338 Winchester Magnum.
The .338-06 is a wildcat cartridge based on the .30-06. It allows heavier .338 caliber bullets to be used from the .30-06 non-belted case. This is a better choice for heavy bodied game such as moose, elk, and brown bear than the .30-06. 338 caliber bullets became more widely available after the introduction in the late 1950s of the .338 Winchester Magnum cartridge, frequently chambered in the Winchester Model 70 rifle. The .338-06 maintains much of the benefits of the .338 Magnum cartridge but has substantially less recoil, makes more efficient use of powder, and allows use of widely available .30-06 commercial and military cases. The trade off though, is less available range due to reduced muzzle velocity. It is similar in concept to .333 OKH as well as the .35 Whelen, which also use the .30-06 brass case as a basic for the cartridge."
.338-06. (2008, August 24). In Wikipedia, The Free Encyclopedia. Retrieved 18:02, March 22, 2009, from http://en.wikipedia.org/w/index.php?title=.338-06&oldid=233876894