From what I have been told, Savage has in the second story of there shop, a indoor 100 yard range. The do a visual inspection of the rifle then test fire it. They set the rifle in a rest with a 4 power scope and test fire it. If it passes that test, they send it back, if it doesn't they look for the problem. If there is a problem they fix the problem and then test fire it again, this is done until the problem/s are all fixed.
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