I'm not convinced you can build off your 700 for what a Cooper costs. A Jackson game or Excalibur will run around $2k. You're probably already into your Sendero for close to a grand. by the time you true action ($200-$300), add custom barrel ($300), have it chambered ($200-300), you're already there. and it still has the same factory bolt and ejector, bottom metal, stock, trigger, etc.
If you had a cheapo rem 700 SPS or something, I would say build off it. but if you forego the Cooper route and want to go custom, sell the Sendero and buy a custom receiver - start from there.
If you had a cheapo rem 700 SPS or something, I would say build off it. but if you forego the Cooper route and want to go custom, sell the Sendero and buy a custom receiver - start from there.