Maybe the bullets had to jump too far to reach the throats. Or the heat and humidity are causing fatigue.
I took two 1/2 gal milk jugs and some 88 gr .32 S&W ammo and headed for the woods.Filled the jugs with water at the last branch and shot the jugs with the .32 S&W ammo from the GP 100.I shot, heard some bang, and did not see any indication of a hit. Started to go look and finally noticed thewater level in the jug going down. I shot the other jug and again a slow leak.The .32 S&W ammo shot well, fair enough accuracy; but, right tame terminal damage and no recoil.