I would put a 4x12x40 on it. A groundhog is a small target at 300 yards, and a 3x9 will have you wishing for more. There are a few scopes in this price range (Nikon, Bushnell, Redfield, etc.) or maybe you can find a deal on a slightly better scope if you look around. There are a bunch of "refurbished" scopes on the market - but beware of the warranty on them.