8 gauge choke dimensions
 

I recently went looking for a listing of choke dimensions for the 8 gauge, and came up with.......nothing.
Greener, Howe, Dunlap and TPS, zip, nada! :shock:

Having the opportunity to measure a number of 8 gauges recently, I found a large variability. :cool:

So, does anyone have a reference which published "standard" choke dimensions for the 8 gauge:corn:

Maybe Josh has a source?

source
 

Ah, nope!

Might have to rely on a pattern test at 30 yards to determine the choke. In theory, the only choke that should throw a 100% pattern at 30 yards inside a 30" circle is full. 20 yards is too close and 40 yards is farther than needed.

ok, but
 

A good project for your new 8 Mike!
Just looking for a published standard, as exists for every other common gauge.

I may just do that. Usually don't pattern any guns unless I'm using said gun for turkey, then I'll shoot a know distance at a turkey head/neck target since that is the same thing as shooting at a live turkey. Might do a point of impact test, but not a pattern.

But Parker Bros. Standard pattern board test for most gauges and at which distance the choke was determined, was 40 yards.





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Theoretically speaking, at 40 yards you won't have any choke pattern at 100% with modern load data. Plus, why step off another 10 yards when it's not needed.

I do not have any published data but do have three Parkers with letters that specify choke, 60660 8ga O grade letter says RH 115 #4 pellets in a 30" circle at 40 yards LH same. The chokes measure .025/.026. 157318 PH 8ga specifies in the letter RH modified, LH full and the chokes measure .038/.042. 161252 GH 8ga specifies in the letter to pattern with BB shot RH full, LH full. The chokes measure .046/.045.
It seems to me from a very limited sample that the restrictions are the same you would encounter in 12 and 10ga guns.

Makes sense to me Craig. .025/.026 should be IM/IM, .038/.042 should be F/XF and .046/.045 should be XF/XF.