Has anyone tried to make 6.5 or 257 jdj brass out of 220 swift brass?
Diameter of case at base is too large.
It would be possible with a strong press and a very good lube, but would the internal capacity be comparable? I suppose that if you cannot find .225 cases it would be a potential substitute, but I have no experience with forming cases that much smaller than the desired parent case.
The base could be turned. I had some 17ccm brass made from 22 hornets where the bottom 3rd was turned.
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