The Sightron line of scopes that have an adjustable objective or side focus will adjust down to 10/11 yards (go to their web site and you'll be able to click on various models and the specifications for info). Here in Cody we have an indoor league during the winter. I bought ~ 2years ago the Sightron II 6.5 x 24 with AO (now it's a 6x24?). 6x is not too much, as you practice you will be able to use even more magnification at 50 feet (the good shooters are using 24x off hand with schutzen style rifle). In addition, with the variable power, you can then go outside and shoot at 50, 100 & 200 yards from a bench etc.