the other 3 were shot at 106 &110yds only 1 ran about 20yds and all shots were passthrou with smalish exet holes about 1 in. in size.so it must have something to do with speed
You are exactly right!!! The same bullet pushed faster will expand faster, and pushed faster yet will explode without going deep enough to do the job properly.
You HAVE to keep the bullet in the velocity range it was built for, and also match it to the game it will be used on.
Drilling Man