Some months ago I started loading for this custom 7mm STW that I bought off of a friend. His dad had given it to him and he didn't shoot it so he sold it to me. Anyway if you remember I was having some trouble with a sticky bolt trying to load my own. I was at a sports store and came across some factory ammunition (Nosler 160gr Accubonds) so I decided to give them a try. They stuck even worse than the ones I loaded. So I have been a little frustrated to say the least. I started researching a few things and came across a post about headspace being off. So I started looking at some of the cases that I had fired.
There is a 0.020 band just in front of the belt that is smaller than the rest of the case. I wanted to post some pictures for experts to look at and see what you all think. Any help/suggestions would be appreciated. Before I bought the gun I shot it about 13 times with some factory ammo that he had and didn't have any problems but those cases do have this same marks on them. Not as defined though.
From the belt the shiny area is smaller and increases in size slightly up to the end the shiny area and then it starts to taper back down as you go further towards the neck.
Thanks