Different take/question on an old used up subject. Kinda interesting.
I know that at 200 yards I have to lead a coyote about 9' if he's running all out. Read the math somewhere and successfully used it many times. So figure your handgun bullet is going less than a third as fast as my .22-250 but your range is shorter it would end up being about 2.7 feet at 20 yards. That's ROUGH ROUGH math. Is it better than nothing? Your guess is as good as mine.
CB
