"Actually, M1 cardines have poor penetration..."
Compared to what? They have much more penetration than any of the commonly used handgun rounds. If you believe the carbine round has poor penetration go to the Box O' Truth website and see their penetration tests, or go to the ballistics gelatin tests on http//www.brassfetcher.com
Why would you expect poor penetration with a 110 gr bullet at 1950 fps?
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