I use nothing but factory ammo for GSSF. That way - if there is a malfunction - I get a reshoot. If you're going to drive long distances and pay match fees why let a high primer screw up your score? My favorite load is Winchester's 9mm SuperClean NT. It uses a 105 gr. jacketed SP bullet that is very accurate but has very soft recoil. The .40 NT load has a 120 gr. bullet and is also very user friendly.