I have the fn 5.7 handgun. I have only put maybe 100 rounds down rage with it. I keep it cleaned and lubed. I purchased new ammo today the ss198lf and it jams every shot. So I put the ss197lf in and had no problems. The 197 if 40gr and the 198is 27 gr. I'm not to sure why this is happening. It's not feed the 198 ammo into the barrel or it won't eject the cartridge . Any help guys??