I acquired a G19 gen3 yesterday. It came with night sights, two mags and a Glock holster. I put 100 rounds of Magtech thru it and 100 rounds of Federal and both shot great. When I got home, I field stripped it for cleaning and was surprised how clean it was. I still cleaned it. I generally only use Magtech or Federal. Has anyone else had this same situation regarding ammo?