I have the option for a Leupold VX-2 3-9x40mm. Now, I know Leupold has a VX-2 Rimfire 33mm version which is perfect for airguns too, but I like the 40mm objective and get it at a very good price. My question is simply: One difference is the 3-9X40 parallax is adjusted to 100y or beyond. Will this be any problem if you keep the power at 3-4X?