Update: I finally got out to the range. Rifle is good to go for DMR kind of stuff. From a rest it does 1.5" groups at 100m. I'm sure I could get a bit more by reloading, but not likely as of yet. Going to save up for good glass, but in the meantime, scored a scope from a sniper buddy of mine in exchange for some computer help (kek). It's the SWFA 10x I was originally going for, but this is the side focus model. I was going to mount it, but I just realized I have no idea the right way to do it. I also don't have a vise, so I guess I'll have to wait a while to get more done one it. Also, does anyone know how to remove the rear sight? This scope has a nice eye relief, but with the sight on, I either have to get taller rings, or I have to get a spacer for the stock. I'm also going to make a cheek pad from foam. I would order a cheek pad, but that seems not worth it when you realize that this is done all the time on the M110, at least from what I've seen.
To be honest, dealing with this has shown me that while I may know how to do the firing solutions, I have no idea how to do deal with the actual equipment. I've never had to mount my own optics. The one thing I don't think it will need is a new trigger. I seem to do well enough with it.