I made the change about 2 weeks ago after some heads up from 2 other trusted sources who notified me of issues.
I have not had any issues however until things were cleared up and a good print was confirmed from Defiance I opted to tell customers to send in the action for the first barrel job. We measure it, laser engrave a tag with the measurements and send it back with the barrel for no additional charge. After that I dont need the action again as long as the engraved tag isn't lost by the owner.
We did it as a proactive safety measure based on the findings of 2 other gunsmiths whose experience and opinions I trust.
It may turn out to be just a false alarm but until I know that 110% we are changing policy.
Of someone has existing barrels on their rifles and no problems then there is no issue to worry about.