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Ben,
For some years I shot bench rest rifle. In that game you shoot 5 rounds and then go through a process of cleaning thats almost hard to explain. Every bit of copper is removed, all strokes with brushes and patches are counted..different solvents for each phase of the process. Bores are still "shot out" they are not damaged by the cleaning process if done correctly.
But I agree that sporters are not bench rest guns and cleaning after a few shots is not pratical for field use. So, it's best to see how a rifle shoots with a dirty bore.
And I expect some movement in POI from the transition from a clean bore to a dirty one.
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