The .22LR sub-sonics have heavier bullets that make them sub-sonic some are 60grains, they have more than enough energy to kill Mr. Beaver @ 50 yards.

People should not compensate for poor marksmanship with a bigger load, most people know my motto "keep it lite and shoot it right". Refer back to the P90 thread when people want this massive firepower while anyone skilled knows that a little plinker in the head is what the doctor ordered.