FN Five-seveN
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...