There are lots of spring weights available for the SP-01. I'm sure there are users that can tell you what weight they have changed theirs to. When I shoot 115's from my SP-01 Tactical, they eject very close to the weapon, up about a foot and right about two feet before hitting the floor (with the 18 lb spring). If you really want to continue using low-weight, low-recoil loads try the 16 lb. spring first. When you shoot the 124 +p's notice that the brass flies right & slightly rear almost 7 feet. The more powerful load is what the SP was designed to eject. Much less than a 16 lb spring and the slide might put undue pressure on the slide stop when fed 124's. They even sell 12 lb springs for this gun -that can't be good beyond teensy, sub-sonic loads.