I am a avid collector and shooter of vintage and repr Win 52's, and I must say these Winchester reproduction sporters are one of the most accurrate, even competing with todays Cooper, Kimbers Etc.! They have match chambers, reall great barrel steel and awsome fit and finnish. The best group I got out of mine is 1 hole at 25 yards with CCI St VEL. I wish I had more money whhen I bought mine new in the early 1990's, but I was a struggling Apprentice cabinetmaker making $7.75 and hour, this when these guns were retailing for $750ish, almost a months wages at the time!
About bases if you can't find any Leopold 2 piece bases, you can mount a Winchester model 88 one piece weaver mount to the action backward and this worked out for couple years for me till I put a set of peep sights on it. Great gun, hope you have as much funn as I did, cheers Dale Z!