I recently went out to the range and fired .45 Winchester White Box through my Glock 21 SF with a 30 KRISS TDI Mag Extender and had failure to feed a couple times every magazine. I'd like to know if anyone has any experience with the Mag Ex and Winchester White box 45 fmj. I also had a failure to feed with my factory glock mag as well. I think i might have over lubricated the slide above the barrell.
