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Proof competition prefit barrels

All the Proof SS barrels I've used are hammers. They make a great barrel now days. Out of the 200+ barrels I chambered last year, I didn't have a single bad Proof barrel. I did get a bad barrels from a couple of the other major barrel makers - chunks of rifling sheared off after a handful of rounds, inconsistencies in rifling, some nasty tooling marks, etc. This number was very, very small though. All the barrels from the alpha manufacturers are really solid now.

As far as how long they last compared to other manufacturers, there is no difference. That is all dependent on the cartridge and firing schedule.