Hello I just finished this build. I started with a remington 700 action I then trued it. Then I installed a shillen barrel on it that I also threaded and chambered myself. One of the first problems I realized that I had is that my neck is to tight. The reamer I orderd cut a .369" neck diameter, while the loaded cartriges have a .367/8" neck diameter. I dont want to neck turn so I guess I will order a neck reamer in a larger diameter. The next problem I have is that some of the loaded rounds are hard to chamber. I can get the bolt closed but then after opening it and pulling the cartrige out there is gouge on the bullet about 1/16" fron the top of the neck and about 1/4" long. I just cant figure out what is causing this mark on the bullets. My guess is that the throat might be too short, but im not sure how to check that. I included a picture of the cartriges with the gouge. Im trying to fix this without pulling the barrel because I already bedded the stock. I am using 338 ultra reloading dies to load a 300 grain SMK into a remington case if that helps. Thank Nick.