Bought a brand new Savage 110. Got home, pulled the stock and cleaned all the manufacturing debris and crud off and out of it. When I put it back together, I was careful to be below torque specs on the action screws. Chambered a cartridge and it seemed like the bolt was hard to close the last bit. Then, I had to work to get it to lock down, unlocked it, locked it, it was fine. Tried to open the bolt. It will NOT open. It seems I loaded a cartridge that was fire-formed for my other .308. I understand why it felt "weird" when it loaded, but now what? I don't want to tear up a new gun. Should I fire the cartridge(incidentally creating a case fire-formed to this gun in the process)? Should I unlock the bolt and smack the unlocked bolt handle with a plastic mallet, trying to move it back to extract? Any safe suggestions would be appreciated, gentlemen.