My Ruger M77 (w/rear tang safety) bolt dosen\'t move smoothly. Help please. I can't figure out why my bolt drags when sliding it to the rear or when pushing it forward except for one small part of the travel. The first centmeter of rearward movement, after fully lifting the bolt handle is free and smooth. At this very point the bolt body encounters a slight but sudden bump and lifts about .010". I believe the lift is at the the front end but it is hard to tell. The bolt movement begins to feel dragy or smeary for the rest of its pull. The opposite is true for the closing. Smeary, then at the last bit it is free and easy. When the bolt lifts it seems to cause a rubbing of the top of the bolt and the inside of the reciever below the rear scope mount BUT the bolt is not bound up and will wiggle if the handle is shaken. The spring that holds the extractor is not oversprung and is not rubbing. This is the first thing I looked for as the problem. If you know why this is happening (it has always been like this I think. At least as long as I can remember) or have some ideas please let me know. I can't seem to figure it out.