Pits in a barrel are like cavities in a tooth.
Damascus barrel pits could even be hidden flaws in the steel that has shown up from years of use and developed into a cavity.
Once rust starts there is no really stopping it...especially inside a small crevice inside of a thin steel tube that's exposed to high pressures, fire, heat, suet then lined with plastic wash and lead.
Pitted barrels are notoriously hard to clean.
Anyone that tells you they can measure the depth of a pit or even evaluate the safeness of shooting a gun with pitted barrels...is to put it mildly full of sheep chit.
You like the gun buy it...shoot it...take your chances.
Only thing you might loose is a finger or an eYe.
