Some old wildcats from left to right:
334 OKH developed in the late 1940's by necking-up the 300 H&H to .333 using 200 to 300 gr bullets, some variations in the cartridge neck.
350 Griffin & Howe developed in the early 1930's with their headstamp, loaded by Western. This was a 375 H&H necked down to .350 with a 250 gr bullet at 2700 fps.
458 Winchester as a sample
475 OKH developed in the mid 1950's, using a 375 H&H necked-up, 600 gr bullet at 2250 fpsAttachment 17595Information
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