I had a .338 but I sold it. Recoil was more than I wanted to tolerate. A .30-.338 is a .338 necked to .30 cal. Compares to a .308 Norma magnum. For all practical purposes, the .30 magnums are about the same. By the way, what a small world, I am originally from Laramie and now reside in Shoshoni.