Generally...if your having stovepipe malfunctions, you're limp wristing. I would be more concerned about worn out and weakened recoil springs, than I would be about using lighter or heavier bullets. You'll have to measure the length of your recoil spring to determine whether it is worn out or not.
A bladed biological living humanoid target...will be vulnerable to a piercing object, that might ensure a double lung hit, that enters under the armpit.
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That rifle hanging on the wall of the working class flat or labourer's cottage is the symbol of democracy. It is our job to see that it stays there."
--- George Orwell
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