A manson gauge is very capable of getting accurate thickness measurements.
There is lacks is the limitation of bore size it can measure. As I recall, when I had mine it would not go into a tightly choked 20g. muzzle.
And the size of the ball on the end of the rod does
Not allow measuring into pitted areas as much as a hosford gauge does.
But, for the money, a Manson is a good piece of equipment.
The areas that Drew measures on his record sheet are the areas I like to sample As well. At the forcing cones, around the forend lug (about 9-10” out) and The minimums found out in the second half of the tubes.
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B. Dudley
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