Something in 204 Ruger,223, or 22-250. If you limit yourself to 150 yards or less the 17 HMR is a good choice. 243 with 55 grain V-max would work well too, and then you could re-zero and use 95 grain bonded bullets for deer.
There are lots of good shooting rifles out there for these calibers, from Savage to Ruger to Browning to Kimber, pick your favorite.