This is a very interesting thread. There was an article in a 1988 issue of "Rifle" magazine called "The Argument for Small Caliber Handguns". The writer used brass bullets turned in a lathe for both the .22 LR and .25 ACP, both would penetrate a Canadian nickel. Basically a home made version of the MSC round. In small caliber weapons penetration is the key. If it does not penetrate to vital organs, it will not stop. The .25 ACP was designed to be reliable in a small pistol. A centerfire has a greater potential of reliablity than a rimfire in a small pistol.
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