hi my name is Curtis Keller I am 12 years old, and I have a 257 weatherby in a remington model 700 sps stainless. I have been reloading for it and I have been having issues with the brass going in hard after about the fourth or fifth shot with neck sizing. My bolt face also collects some brass on it too. I have tried full length sizing after shooting the factory norma brass once and that just makes it go in hard too, but then I can shoot it and it goes in easy until the fourth and fifth reloading then they start going in hard again. This gun has no problem with shooting 1/2-1inch groups at 100 yards.