Answer is yes it has been done. Google it, not a lot of info available.
Barrel life gets tossed around like "you'll shoot your eye out kid". A barrel is dead when it no longer perform the tasks it was intended for. Some are dead on arrival, we replace them, dump them, make excuses for them, and move on. Some of what we consider accuracy comes from 5-10 shot groups used in other disciplines. This type of rifle likely should be judged base on first round hits, a second on top of that, and rarely a 3 round group. 3 rounds seems where the ELR folks are going.
Bullets are the real issue. You'll need one heavy enough to develop decent pressure for a consistent burn, and provide a decent BC. Presumably long range is your intended use.
The 155 Berger is coming-it would be interesting to see it severely tested. Steve from Hammer has a pure copper in his head, probably in hand this summer.
Barrels-you'll need one with enough twist, and could be a place to try gain twist.
You'll need a Weatherby sized action.
The end product will be very specialized.
It's about having fun. if it's a process you enjoy go for it.