I don't follow a fixed barrel break in procedure. What I do, is to clean a new barrel, and fire a group, and watch for fouling. If a barrel fouls quickly, I clean it more often, if it doesn't build up fouling, I clean it less often. Some barrels foul a lot at first, but soon fouling decreases. Some barrels foul very little from new. Many barrels show good accuracy from new, others don't do their pest until several groups have been fired. And the new CFE powders tend to greatly reduce copper fouling, so I clean less when using them.
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Only accurate guns are interesting.
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