ORIGINAL: XPatriot
How old is that Bushnell scope? Some of the older ones are pretty nice. Rings are easy to replace. Keep the stock, if it already has some dings, it won't mind a few more. As for the .30-06 or .308 being marginal, those are opinions, and everybody's got one. I only have one rifle, a .308, and I believe it will kill anything I hit with it.
The scope is probably 30 years old. It was a cheapo scope back then. Dad didn't want to spend a lot of money on it because he knew it'd probably have to be replaced fairly often due to the beating that it'd take while dogging bears. It never had to be replaced, but it's certainly taken it's toll. It needs to be replaced.