This is a shot load. It has an effective range against very small animals of about 20 FEET. Due to the fact that you are shooting it through a rifled barrel, spin will cause the pattern to open like a doughnut, with a hole in the center. The size of the shot is #12, which is about 1 notch larger than lead dust.
Since almost all .22 autos are blowback operated, and the shot lacks the mass to cycle the gun, they can be single loaded and fired, but will NOT cycle the gun semi-auto. Bolts, pumps, break action, revolvers- not a problem.
But no, will not hurt your gun. Just not real effective for anything, either. Have used them to dispatch a snake where I did not want a solid bullet bouncing around.
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What we have heah is.... failure to communicate.
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