Rivelling thanks, boomers in thin barrels is a definite suspect. Severe riveling is readily apparent, but most often one sees a light "ringing" not the series one sees in a rivelled barrel ie few cases of refracted lighting. In the case of few rings, I believe there is damage, but not fatal damage to the barrel. I see it like having a mild heart attack, you can have a life but your racing days are over. It does mean using low pressures and light loads in the gun.
How can I find that thread as I would like more information, it is a difficult subject. Thanks
Last edited by pooch; 09/11/12 11:34 AM.