I have a recently purchased Leupold VX-Freedom 3 - 9 X40 rimfire scope. The literature that came with the scope makes no mention of what distance zero parallax is set for. I have a much older Bushnell 3 - 9 X 40 which has parallax adjustments at the objective indexing from 15 yards to 100 yards to infinity. How important is having parallax adjustment? Do scopes get designated "rimfire" because they are built cheap and light, or should they have features like parallax adjustment or a reticle suited for short range use, or have other features? If you want the best scope for a rimfire, it is better to go for the higher quality scopes and ignore any "rimfire" designation? Or look for higher quality scopes with certain features? TIA