The .338X74R wildcat (9.3X74R case necked down to .338) has been around for a long time. Elmer Keith played with it extensively in a No. 1 back in the '70s. I don't recall ever seeing one in a two-row though. The .338 is an American caliber, meaning that bullet selection in the heavier weights is relatively poor. Since the USA is the home of the tragic mental illness known as Velocity Freakdom, the 275 and 300 grain weights don't sell well here. Since I can't see the need to use a .338 for coyotes, the usefulness of 210-225 grain .338 bullets escapes me completely.

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