One word on this "LOW PRESSURE" bit. All you folks riding this low pressure "Hobby Horse" are talking about maximum chamber pressure. Take two loads with same overall ballistics, say 1oz @ 1200 fps with pressures of 10K & 7K in the chamber. That 10k load is almost certain to have a slightly lower pressure down there where the thin spot is.
The only problem with that .019" assuming as previously stated it's in the forward third of the barrels is from handling damage, not from the shooting.
Do you have a gun with good dimensions over the chamber & first 9-12 inches of barrels but thin toward the muzzles you want to shoot. Shoot a moderate shot load with moderate velocities using the fastest powder which will stay within proper pressure levels at the chamber. DO NOT think you're babying the front of the barrels by dropping the pressures at the rear unless you also drop the total ballistics of the load. Do not use any of the so called slow burn Progressive powders if you're truly concerned about the Front End of the barrels.
