Cabelas runs their Covenant 7, 3-21x on sale for $300 once and awhile and a lot of 22 guys like that option if they are doing the NRL22 Base Class with MSPR limits. Lots of great options just not at $300, Midas Tac, Bushnell Match Pro, big thing with a 22 scope is to make sure the parallax goes down to at least 25 yards, lots of options only go down to 50yds.
Academy sports right now has some very interesting prices on Athlon products once you add them to the cart, significantly below MAP, but still hard to get anything other than the Argos under $300