OK, I talked to HR,
mentioned my whelen problem and asked if they have been hearing of the issue. SHe said yes, said that engineering cliams it is an ammo problem. I can send mine in and if there is nothing wrong with my barrel, they will replace it with another caliber. There is no fix. The caliber is currently stopped (not sure of the wording) but it is a result of this issue - that was clear.