.22 Long Rifle bullets are made of soft lead and certainly do distort on hitting a solid surface. In fact, they can even literally melt when striking something like steel as the kinetic energy is converted to heat.
Those bullets look like hollow points, which expanded about as expected. Solid bullets would tend to penetrate better and remain more or less intact, though they also would be mushroomed and distorted.
I think your gun is normal.
Jim
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