well, sounds like your unhappy about the gun, not the caliber. If I was you, I wouldn't trade it in, I would put it on gunbroker.com and sell it. I never trade in my guns at any gun shop, they always offer you 50%(and even less) of whatever they are worth. You should atleast get 85-90% of what you payed for it from gunbroker.com
get a ligher gun, tikka stainless light or whatever you like, but I would strongly suggest a 308.