just got my new xcr with a nightforce and i have put about 40 rounds threw it an some cases are being a pain to get chambered and too make things worse with nosler custom factory bullets they aren't ejecting very well or get super jammed up, cases at the thoat have a little flat spot after fired? i tryed using remington premier siroccos and they were good , till tonight i went to the range and my first shot was tight to get in so i tryed another and it wasn't as tight but still tight. all ammo used is factory, i have no idea? need input on what to start with, i was thinking head space too small but i don't know....