breech seating bore diameter pp

[bruce moulds]

chris,
the secret of pigs is to dissolve the fouling.
this requires a long slow push, and you get a feel for dissolving happening.
dissolving can be sped up with either a soluble cutting oil or murphy's oil soap solution of sufficient strength.
pushing with a dry patch gives you 2 passes for the price of one.
cutting oil is possibly beneficial in that it is less rust initiating than a murpyy's solution or straight water.
both the solutions are easier to push than straight water due to the fact that they act like a lubricant.
keep safe,
bruce.