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I bought a aftermarket choke for my 725 12 ga. and had a friend mic it to check the constriction. I found out that my bores measure .736, rather than the standard .740. Just seeing if anyone else has checked there's
 

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I have not checked mine, but will. I’ve been told it’s not uncommon for Brownings to be a bit off and usually to the more open side.
 

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If someone made a choke tube to fit the 725, he probably took the oversize Browning bore into account.
 

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The lower barrel measures .738 in. via Skeets bore gauge, the upper barrel at .739. The exit diameters of the Invector DS choke tubes were a bit puzzling. The IC tube measures .739, the Mod .731, and the Full at .702 inch. Yes, you read that correctly: the choke tube etched “Imp. Cylinder– Lead / Mod. Steel” has essentially no constriction at all. At best, in the lower (slightly tighter) barrel, you have .001 in., .007 in., and .036 in. constrictions, the “Full” choke designated as a lead-only choke.
 
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