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Old August 7, 2012, 10:05 AM   #9
PetahW
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Join Date: September 19, 2008
Posts: 4,679
FWIW, since the gun already has only the .22 magnum cylinder, it was most likely originally a convertible (2-cylinder model) that's become separeted from it's fitted LR cylinder.

IIRC, only .22LR-only guns were issued with single cylinders, and there were never any .22WRM-only issued.

IF you buy a used cylinder, one that's a tad too long can be fitted, but one that's a tad too short cannot be shimmed w/o affecting either headspace or barrel/cylinder gap (depending upon the end shimmed).

If your family cannot locate, or never had, the LR cylinder, I would 1st try the Colt Service Dept about fitting proper cylinder, before buying one elsewhere.

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