I recently received some of Ken's new production Reising mags. Overall, they look great. But when I installed onein the gun, the bolt would drag and hang up. I had to push the action bar forward to get the bolt to close. If I removed the mag (without touching the bolt or action bar) the bolt would slam closed. I figured the mag catch hole on the back of the mag had been cut a little too low, and that the bolt was dragging on the top of the mag. No big deal, I could just move the hole up a little with a file.
But before I started doing that, I measured from the feedlips to the top of the hole on the new mags, and compared that to my older mags. The hole was in the same place.
Upon closer examination, I found that the action bar is dragging on the sides of the mag. You can see from the picture below where it has worn the finish off just in front of the feed lips. The mags on the left and middle are new - never been fired. They have only been hand-cycled. The mag on the right is a pre-'94 Christie mag. It shows evidence of wear here too, but it does not seem to drag. I have never had a problem while shooting with this mag.
http://img.photobucket.com/albums/v632/GarrettJ/DSC02850a.jpg
Here's a pic of the bolt being held open with the mag inserted. http://img.photobucket.com/albums/v632/GarrettJ/DSC02852.jpg
http://img.photobucket.com/albums/v632/GarrettJ/DSC02853.jpg
I have two original factory mags. Neither appear to have the rub marks that I get on the Christie mags. Since my one old 30 round mag runs fine, I think it's just a matter of breaking in the mags. I could try tweaking the mags, but I don't really care to do something that may mess with the feedlips.
As I said, I think it will be fine. Just wondering if anyone else has noticed this?