Hi
As others have noticed, I have a brand new, never fired 1911 E-Series, the take down pin/Slide stop is rubbing against the frame. Upon field stripping the handgun it is noticeable far more. In the photos it looks black but it's actually rubbing/scatching the surface of the firearm.
If this...
1911CT E-Series .45
I have to agree with OP, 7 rounds in 8 round OEM magazine slips in and locks with little to no effort, nice even click. Loading same magazine with 8 rounds requires it be slammed in to lock in place and feels as though it's being forced in and it's not spring tension...