Well I finally got to shoot my 19 i bought a few months back. I shot 200 rounds of Geco 124gr fmj. I had 0 problems and the ejection was good. I also shot a mag of Federal HST 147 +p...again no problems. Oddly, the recoil felt similar so I assume the Geco is hotter stuff? I took along my gen2 22 and shoot the 19 better with with my small girly hands. The 22 never has felt the best even with a hogue grip. I am happy to report my 19 is great and maybe the Gen4 issues are gone.