Semi-auto .22 Mags have always been problematic.
You have a Long, Thin Walled cartridge that can be fired just by striking the rim. Combine that with the fact that you also need a fairly stout recoil spring to deal with the slide/bolt.
Hence on a misfeed it is possible for the bolt/slide to actually crush and detonate the round outside of the chamber.
Last time that happened to me, my right hand required surgery to reattach some ligaments. . .
The urge to save humanity is almost always a false-face for the urge to rule it.
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