Nomercy- "The bolt is more difficult to open,"- by that I meant actually lifting the bolt handle. After the bolt is lifted, the bolt slides smoothly through the action with no resistance. So, it appears that there is nothing wrong.

pharoh2- about every couple hundred rounds or so, I clean the bolt in its entirety, icluding disassembling it completely and cleaning all of the parts including the spring, firing pin, etc. I put a VERY LIGHT coat of lube to make sure everything keeps working smoothly.