Sounds like either your chamber may be a bit tight/small or the ammo brass is a little bit too large. Get another box of ammo and see how it chambers. Also, may want to measure the new cartridge base to shoulder with something like the Hornady Lock n Load Headspace gauge kit.
Well today I spent a bit of time and pulled the rifle out to continue some of these tests. I tried two other cartridges, a 180gr Federal, and 200gr Remington. I experienced the same difficulty closing the bolt for both of these as well. I then put a layer of masking tape around the head of the case and couldn't get the bolt to budge. It's looking like more than just an extractor issue from what I can tell at this point. Anyone have gunsmith recommendations for the DFW area? I was going to try APR first.