A good while back i started a thread about a Sporterized Krag Carbine that was a family heirloom, I gave that gun to my uncle along with a note describing the issue it had and now it proudly sits on the wall in his living room.
This thread is about something I noticed that the Sporterized Rifle i bought to fill the Krag sized hole in my collection has been doing to my brass. The gun appears to be pushing the shoulder forward and creating a much sharper shoulder. i know this gun has had work done to allow the guide lug to engage on the receiver, and my thought is that this has caused it to have a headspace issue.
is this a headspace problem or simply a oversized chamber?
i have included images of the gun and a comparison of a unfireformed case next to a fireformed one (it turned the picture sideways for some reason).