I fired one a few times in the Military. And yes, Herman, it is the same round the ol Ma Duce fires.
The bullet does NOT expand unless it hits armor. Now, keep in mind, that's military FMJ loads.
If you did get a round off, every critter in 2 miles of you would be gone. Just a brutal blast.
Prolly fun to shoot prarie dogs with at exceptionally long ranges just to see how good a shot you are.