Thread: overbore barrel
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Old February 5, 2013, 03:21 AM   #9
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Join Date: February 3, 2013
Posts: 1,235
I do not know how current this is but per Mossberg
* * * 935™ and 835® 12-gauge barrels are overbored to 10-gauge dimensions
and see this:

12-GAUGE MUZZLE COMPARISON: (.775) Overbored 12-gauge 835 Ulti-Mag barrel (left) -vs- our standard (.731) 12-gauge barrel (both barrels are shown with flush-fitting choke tubes installed).
Still, I am not sure that is a true 10 gauge bore as I believe a 10 gauge is a .779" bore diameter. but what is .004"?
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