Galazans drop in gauge is a quick check type of tool. And it will only be reliable if the bore diameter is a true .729" or close at least.
The report barrels would be, but the difference between Q1 and Q2 are pretty minor. Kind of like SK1 and SK2. Without a dial gauge, you would not know the actual constriction.
Unless they have been altered.
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B. Dudley
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