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Old December 3, 2012, 06:39 PM   #13
Mike Irwin
Join Date: April 13, 2000
Location: Northern Virginia
Posts: 39,212
Donnelly's book on cartridge conversions says to use the .270 and head swage it.

Yet, on the very next page, for the 6.5x52 Mannlicher Carcano, he says use the .220 Swift.

Given that the Italian and Japanese cartridges are VERY similar dimensionally, I don't see why you couldn't make a stab at using either .220 Swift OR even 6.5 Mannlicher cases.

The rim might be a bit small, but the Japanese rifles had quite a bit of bite so it might well work.
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