[stagpanther]

My opinion is a little different. If you're just going to be an occasional shooter and are not especially wed to the 243 win--then it may be time (fun) to try something else. But if you already have a trusted and reliable track record and knowledge base with the cartridge--then just get a new barrel. Barrels are commodities, just like cases and they are going to wear out and need replacing. About the only consideration I would toss into the replacement scenario is whether or not you want to do it yourself, in which case--just like reloading your ammo--it pays to get the best tools for the job--and the best receiver set-up (that you're willing to spend money on) that allows easy switch-outs and holds as close to blueprint accurizing tolerances as possible.