Looking at probably $1200 minimum these days for a decent barrel and install, that isn't cheap anymore lol.
Never get any of that back if you get tired of it and want to move it.
There is no shortage of HVA 1600/1900 and many other pretty nice Euro trash made rifles at Intersurplus for $500-$900, so I dunno, the 6.5x55 shoots good in any rifle I've had, like a custom barrel isn't going to improve anything accuracy wise anyway.
I'm sitting on a near new Schultz & Larsen M98 heavy target barrel in 6.5x55, 26", enough meat on it to put it on anything modern. I've thought about the same thing, put it on a 700 turned down to a #2 contour, would be nice, but is it going to do anything better then a $500 PH or HVA that I already have? Not really.
I THINK if/when I do commit to working that barrel onto something, it won't be in 6.5x55, some standard case head, but something different and unique, I'm going to be stuck with it anyway, like a 6.5x64 (necked down 7x64) or maybe a 6.5-280AI, easy to form brass, some decent performance over the 6.5x55, would hang or exceed the 6.5PRC and not be stuck with 3 fat short rounds in the mag.
Damn...might have talked myself into a custom while trying to talk you out of one lol.
Gunnutz...lol