I have a few reloading questions if somebody has some answers or theory. I am reloading for 7mm rem mag. My gun is a Weatherby Vangaurd. It shoots really well. I had a 5 to 6 inch group at 1,000 yards. The Problem I have is some of my brass are super tight and hard to close my bolt. On a few I have to really use some force to close the bolt. I use an RCBS re sizer and bullet seater die set. Nothing fancy. It is possible that a few brass was shot in a remington gun. Question #1 Am I missing a step or doing something wrong in the resizing process? #2 I inspect all my brass and have had a few i have had to toss due to stress fractures in the neck of the brass. Could my brass be getting to old? #3 Is there a difference in quality between brass shells and nickle shells? I am thinking about buying new brass. #4 is there anything I can do to keep my brass shinning and looking nice, such as applying wax or a product and polish it?