I have had a couple of Re-barrels........
I had a Ruger 77 (tang saftey) that was a switch barrel in a #5 taper 308 (douglas Chrome moly) and a Hart 243 AI .265 neck zero free bore in a McMIllen hunter class stock. Holy cow, what a shooter that rifle was.
Here is the deal on a Ruger, you talk Ruger to a custom gun maker and you are basically an odd ball maybe a queer for sure. How much of an odd ball is yet to be determined. I did it just for the heck of doing it, I was tired of being lied to by the Bench Rest crowd. The benchrest crowd taught me that I had to go whole hog custom and after I had 8 Hall "M" actions, they still would not shoot as well as a trued 700 action that I had on hand (probably the Barrel).
If you like being different, then Ruger is your balley wigg for sure. I had 4 -243 AI's with Hart bbls and minimum spec turn neck chambers. I wanted to see what a Ruger 77 (tang safety) would do with a 26" "Light Varmint" contour with a Muzzle break on the barrel with the same reamer. You can just imagine my shock when I took the Ruger, McMillen Hunter Class stock, Hart barrel, 243 AI, .265 neck, zero freebore to the range and shot a group in the 3's fireforming Rem 7/08 brass (necked down to 243).
My conclusion is that about everything that you read about a custom this or that is a crock of crap. The accuracy is in the quality of the barrel, design of the reamer, quality of the stock, quality of the optics, and quality of the bedding.
I got really pissed off and put a Shilen select match in 6mm Remm on a Parker Hale 6mm Remm Varmint rig. Holy cow, first time to the range, 50.0g of 760 with a GTB 60g HP shot @ 4000 fps shot in the high 2's. By now, I know that I have been lied to in as far as actions etc are concerned.
Bottom line, if you like Ruger, they will shoot with the best of them with custom barrels and minimum spec chambers. You will take a bath on them if you ever dicide to sell them because no one wants them.
I fell in love with a Sorel, bald face mule while I lived in Az. I sold my precious Ruger 77 in 243 AI/308 switch barrel. The guy that I sold it to sent me pictures of p.dogs that he shot at 1000 yard and got into the 1000 yard club...the mule ran off with me and just about turned me into a quadra-pologic....there is a moral in there somewhere I reckon.
Bottom line is that if you like Rugers, you are sure in for a beat'en!
Good luck and Merry Christmas or Happy Holidays!