Barrel Nuts

Does anyone offer "trued" or Precision" barrel nuts? or would this be part of a gunsmiths action truing process?

I was installing a barrel the other day and had shinny spots on the barrel nut where it contact's the recoil lug, like it is not making 100% contact. Seems like you would want a true surface if you are going with a precision recoil lug.

Opinions?

Thanks
Dano

The nuts actually are fairly strait from the factory. Take the nut and place it on a stone.

I have true them before most are pretty good from the factory