Ammo comparison because of picky Browning Hi-Power

My 9mm Browning Hi-Power seems to be ammo picky. Not that it has feed issues (it “eats” everything), but precision seems to be very ammo dependent.For example: with GECO ammo 124gr FMJ, I have no trouble holding the black (i.e. get decent groups) on a standard ISSF pistol target at 25 m (diameter of black = 20cm = 7.8 inch). However, with S&B or Magtech 124gr FMJ ammo, shots end up all over the paper target. I should add some quantitative data on this phenomenon some time, but I’ve been testing this several times, shooting groups of 5, switching ammo brands. Continue reading