What causes the fired brass to end up backwards in the ejection port?

[tech]

I have changed mag springs and recoil spring recently now I get my fired brass either caught between the slide and barrel or the spent round wanting to chamber itself rear first. I looked at the clinic and did not find this one. 4" 1911 with wilson mags.

Mike

 

[Redhat]

Proceed to Gunsmithing forum and ask 1911 Tuner or one of the other G-smiths.