bore/groove diameter

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29 December 2015, 18:34

vapodog

bore/groove diameter

can anyone tell me the bore and groove diameter of a 20 ga slug barrel?

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29 December 2015, 20:58

dpcd

.615, +.020 is the SAAMI bore diameter. Which has nothing to do with rifled barrels.
I would ask the maker as, as you can see, the tolerance is quite generous for shotgun barrels.

30 December 2015, 08:34

vapodog

quote:
I would ask the maker

Thanks for the reply.....I'll see if I can get the data from Mossberg or someone else.

30 December 2015, 08:50

The Dane

30 December 2015, 21:34

dpcd

This chart gives no tolerances and is not for rifled barrels. Nice chart otherwise.
Ask the barrel maker as SAAMI does not spec rifled shotgun barrels.

31 December 2015, 04:22

h2oboy

I will have to verify this but I believe .613 bore and .620 groove is what mine are.

Dirk Schimmel
D Schimmel LLC
Dirk@DoubleRifles.Us
1-307-257-9447

Double rifles make Africa safe enough for bolt guns!

02 January 2016, 08:47

h2oboy

Ok, I have one set that is .613 bore and .620 groove. The second set is .615 bore and .624 groove. Both sets are 1-24 twist.

Dirk Schimmel
D Schimmel LLC
Dirk@DoubleRifles.Us
1-307-257-9447

Double rifles make Africa safe enough for bolt guns!

06 January 2016, 14:17

vapodog

quote:
Originally posted by h2oboy:
Ok, I have one set that is .613 bore and .620 groove. The second set is .615 bore and .624 groove. Both sets are 1-24 twist.

thank you