Hi all, first time posting here and in need of some help. I attempted my first at home bolt gun build today. Using a brand new Remington Firearms 85320 700 Ultra Magnum Long Action Stainless Steel. with a criterion 28" bull barrel chambered in 7mm Rem Mag. I didn't have any issues putting the rifle together with the belted magnum go/no-go gauges. However the rifle is not ejecting. It seems like the extractor is not grabbing onto the brass, and its not because of hot loads or anything like that, I have yet to shoot it. it's not grabbing onto a dumby round I put into it. Sometimes it pulls the case back half way and the other it just leaves it in the chamber. if I just tilt the barrel up the case slides out freely. any help would be greatly appreciated. Skylar.