Brand new rem 700cdl 30-06 resized once fired brass from my rem 7600 pump, rcbs dies, rcbs shell holder, fl sized. Trimmed to length, deburred cleaned all lube from brass. Not primed, bolt closes extremely hard, have had brass in other calibers neck size where you can feel some pressure, but nothing like this. Not going to use this brass in this rifle, but can't figure out what is going on. This rifle is brand new, cleaned chamber, bore. Rifle has never been fired. Any ideas would help. Have brand new rem ammo, cycles and chambers fine.