08-21-2015, 05:56 PM
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Registered User
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Join Date: Aug 2001
Location: North Australia
Posts: 17,686
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The grips look to be made of Casein, a plastic made from milk proteins. These have been around for a long time, so your pistol may be older than you think.
You may find it interesting to compare .22WMR with Winchester Z. The Z is a pistol round which may give you a similar penetration (phone books give a measurable penetration) without the staggering muzzle blast.
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