Quote Originally Posted by gb6491 View Post
I suppose the center rail of the slide could be dragging on the follower or some part of the slide is catching on the top of the magazine.
You might check the follower and the slide for any telltale marks.

I also wouldn't discount your question about the ramp bumping the follower.
You could probably check this by removing the top end and reinstalling just the barrel and slide stop in the frame, then install an empty mag and press the barrel down and rearward while checking for contact.

Regards,
Greg
Greg, thank you very much for your suggestion and idea I will try that right away.