I just got into reloading and have a RCBS RC press and dies. Factory ammo is fine in my chamber. All of my reloads are tight, I can drop a piece of resized brass in the chamber but as soon as I try to close the bolt I feel ALOT of resistance and have to use alot of force to close and open the bolt. Any suggestions? Rifle is a pre 64 action 300 wsm featherweight. I thought I just had a tight chamber but this is just too much, factory Winchester silver tip chambers just fine. Don't know what I'm doing wrong.