Anyone have any experience with Randy Gregory regarding barrels and chambering?

'smith work in general?

I don't have first hand experience with his work, but he is a known (great) quantity in high power rifle, and there are some very good shooters that tap him for their work.

I have had him rebarrel couple of model 70s. I would not hesitate to use him again.

Yes, he did some work for both me and my BIL. Good work, I also do like the fact he is a shooter.
Used to shoot with him over in Eau Clare.