Butch Hongisto made my sporter on a 541T action. It holds it's on with anything I have seen, and I even won a Target with it. If you could see what I see through a 6X Leupold, you would know it was all gun and not the shooter. As in any gun, an excellent action is required for a GOOD gunsmith to build on. I would hire someone that has been working on bench rest guns for a good while, and has his equipment show up regulary and perform well at the matches.
If you want to contact Butch, I can get you his information. You better start looking soon. The good smithys have a back log, and you might get your gun before next season starts.
The one thing I love on my Sporter is it shoots good with anything Eley or Lapua makes. It shoots in the 240 to 245 range in matches, and If I crank the scope up to 20 X, It easily shoot 245 plus. I honestly think it would shoot as well as my heavy rifle Butch made me. I'm going to stick a 40X scope on it this off season just to see.
Good luck