I'll add this. The only lead I shoot is rimfire and some down loaded 458 Lott and 454 Casull.
My experience is with jacketed bullets. Now in what context was Cryo used? Most barrel cryo folks do not have the proper equip. to do a deep true cryo. I do have a lot of experience with cryo on barrels and see it as a waste of time and money. It does not stress relieve barrels. I think you will find that Kreiger no longer does cryo.
