I have a Weaver K10 AO(?) that I inherited along with my grandfather's 1950 Remington 721 300 H&H. My question is how do I go about sighting it in? The scope looks straight, no dings or blemishes and seems as if nearly everything is in decent working order, bore and barrel are straight on rifle. The story I was told about it is that my grandfather bought the setup in the early 50's and put 5 rounds through it and set it on a shelf (a few years after his death my grandmother even produced a vintage box of Western Super X 300 Holland & Holland Magnum silvertips with 5 spent cartridges). My problem is that I can't seem to hit the broad side of a barn at 50 yds with the scope on. The distance ring on the end of the scope is graduated from 50 ft to 1000 yds. The only thing I have noticed wrong with the scope is the distance ring does not want to fully adjust and I don't want to force it. Any help would be appreciated.