This maybe chambered for a Cartridge similar to a .300 Rook ?

I have been unable to find the dimentions for a .300 Rook

The chamber is way too long for a .300 Sherwood ?

I just did a chamber cast and found:

Case length from Case Head to Mouth ~1.80 Inches

The case tapers from 3.19 in front of the rim to 3.00 at the case mouth.

The Groove measurement is .296, and across the lands is .299

So what cases Dies and mold should I order ?

Thanks in advance !

Last edited by postoak; 10/21/12 04:55 PM.
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