over on rimfire central they have a section dedicated to that gun, including a list of scope ring, mount, combos. The mueller apv is popular on a budget.
as far as 22lr ammo goes, federal auto match and remington cyclone do pretty well for cheap basting ammo, and wolf match target has been very accurate in mine. Remington standard velocity was a standout for performing very poorly. everything else was just kind of in the middle.