Don't know why I'm thinking about this now but I bought a new 10/22 a few weeks ago that included a Weaver style rail to mount scope. Four holes in rail and four screws in 10/22. Seems simple enough. Problem is only two of the holes line up with the factory screws. Anybody run into this before? Does Ruger make various rails and I just got the wrong one? Is two screws enough to mount the scope (spent more on the scope than the gun). If I should mount with four screws is it better to drill and tap the gun or try to modify the rail to match the factory screw placement? Do they make an aftermarket rail to match the 10/22? Sorry for all the questions. Any help or advice is appreciated. Thanks.