Choke size

Mike · 10-30-2023, 05:31 PM

I have a Parker letter describing my gun it states that my guns chokes were : Patterned 255 pellets with size 7 shot in a 40" circle at 40 yards.
What would that be in choke size ?

Pa SxS · 10-30-2023, 06:35 PM

I hope I didn't make a typo. 30" circle at 40 yards. 255 pellets should equal full choke.

Mike · 10-31-2023, 11:25 AM

Thanks,
Parker must have used a standard load for all their testing.
Does anyone know of a chart that wold show the results of that testing in Parkers ? and what that load might have been.

Bill Murphy · 10-31-2023, 11:36 AM

In earlier times, no standard shot size, shot weight, range, target shape, or target size. In later times, 30" circle at 40 yards with various loads. I have seen loads from #9 to 00 buckshot.

Mike · 10-31-2023, 11:43 AM

Thanks,
This gun was made in 1923 and the chokes were patterned RH 255 pellets and LH 255 pellets of size 7 shot in a 40" circle at 40 yards. Just trying to figure of what this might equate to in today's chokes.

Bill Murphy · 10-31-2023, 01:27 PM

Chuck answered your question in an earlier post.

Mike · 10-31-2023, 02:15 PM

Quote:

Originally Posted by Bill Murphy

Chuck answered your question in an earlier post.

Aware of that, however,
Would there be a difference in 30" and 40" circle at the same distance ?
Seems that there would be,

Pa SxS · 10-31-2023, 05:00 PM

Quote:

Originally Posted by Michael Brown

Aware of that, however,
Would there be a difference in 30" and 40" circle at the same distance ?
Seems that there would be,

Your letter should have read 255 pellets in a 30" circle at 40 yards which is also the standard for a 12 ga. today. Your number of pellets in a 40" circle should be lower than a 30" circle at the same distance. I'm sending you a revised letter.

If I did the math correctly, Tatham had approximately 325 pellets in 1 1/8 oz. of size 7 shot so 255 / 325 = .788 % which is a full choke

Mike · 10-31-2023, 05:38 PM

Quote:

Originally Posted by Chuck Bishop

Your letter should have read 255 pellets in a 30" circle at 40 yards which is also the standard for a 12 ga. today. Your number of pellets in a 40" circle should be lower than a 30" circle at the same distance. I'm sending you a revised letter.

If I did the math correctly, Tatham had approximately 325 pellets in 1 1/8 oz. of size 7 shot so 255 / 325 = .788 % which is a full choke

Okay thanks..

Dylan Rhodes · 10-31-2023, 07:45 PM

Quote:

Originally Posted by Chuck Bishop

Your letter should have read 255 pellets in a 30" circle at 40 yards which is also the standard for a 12 ga. today. Your number of pellets in a 40" circle should be lower than a 30" circle at the same distance. I'm sending you a revised letter.

If I did the math correctly, Tatham had approximately 325 pellets in 1 1/8 oz. of size 7 shot so 255 / 325 = .788 % which is a full choke

Chuck, you lost me here. Just making sure I don’t have an egregious misunderstanding of patterning. Shouldn’t the number of pellets in a 40” circle be higher than a 30” at the same distance?