I have a Remington 700 AAC-SD in .308. I noticed the bolt seemed stiff when I purchased it, but assumed it will ease after some break-in. After a hundred rounds, still no change. Upon recommendation, I've also cycled the bolt and dry fired countless times. The problem only seems to worsen. The bolt is manageable when the firing pin is cocked, but requires a lot of force to cycle once fired. I'm assuming it's some issue with the locking lug and the cocking mechanism, but I'm new to shooting and gunsmithing. Is that normal? Is there a relatively simple fix I could try? Thanks for looking!