Quote:
Originally Posted by Phil Yearout
So excuse me for bein' dumb, but...you can measure the choke constriction with this as well, right?
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yes. insert it from front of the bore and as you slowly draw it out, the gauge's reading will drop - so, the points of constriction is the difference between the inside bore diameter and the reading at the muzzle. you can tell the length of the choke by when the numbers begin to drop.
to use the gauge - you use a ring that comes with it to zero it - the inside of the ring is .700 for the 16 to 10 size. so when you drop the gauge in a 12 ga for example and it reads .029 that means the bore is .729. if it reads -006 at the muzzle - the choke is .035
simple once you have done it a couple times
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