Choke Constrictions

[Karl Ferguson]

From your experience how much choke constriction would you expect to have in a 16 Ga barrel for :

Skeet ______
Imp Cyl ______
Mod _______
Imp Mod _______

The charts I have looked at online seem to be all over the place.

Thanks

[Dean Romig]

The most accurate way to determine chokes is on a pattern board.





.

[Bob Jurewicz]

The answers should be fun. I doubt if 1 in a 100 shooters ever do a real pellet count.
Here are mine in order of requested:
.003"
.008"
'016"
.022"
Bob Jurewicz

[Karl Ferguson]

Thanks Bob... That's what I'm hoping to find out.

[Karl Ferguson]

I agree with you Dean 100%... but when looking to buy a gun the actual choke constrictions is all I have to go by unless there's a letter available. Being able to pattern it would be after it becomes mine.

The gun I'm referring to measures .006 & .017

[Stan Hillis]

Also keep in mind that patterns can, and will, be affected by the shell/loading used in it. With the same constrictions, varying the load can vary the percentages of the patterns considerably.

I do understand what Karl is trying to determine. Here's Hallowell's ideas on it. By giving a range for each, Hallowell is allowing for variances in choke profile and loadings used. Very smart, IMO.

http://www.hallowellco.com/choke_chart.htm

Stan

[Bill Murphy]

I agree with Bob's figures, which are very close to Hallowell's figures. The gun you are considering is a classic improved cylinder and modified..

[Harold Lee Pickens]

Thanks for posting that Stan, I printed off a copy to put in my reloading notebook.

[Dean Romig]

I agree with you Dean 100%... but when looking to buy a gun the actual choke constrictions is all I have to go by unless there's a letter available. Being able to pattern it would be after it becomes mine.

The gun I'm referring to measures .006 & .017



Those are most certainly what I would consider to be Skeet chokes on a 16 gauge.






.

[John Davis]

IC/Mod, according to Hallowell. But his 12 gauge Mod range includes what I would consider a Light Mod and his Imp. Mod range includes what I would consider a Light Full.

[Stan Hillis]

Taken from the link I posted to Hallowell's ........

"The dimensions used in the above table are rules of thumb. Bore measurements by micrometer are useful to predict the pattern thrown by a shotgun barrel, but they remain merely a prediction. The only way to determine the actual pattern thrown by a shotgun barrel is to shoot it, by convention at 40 yards, count the percentage of pellets falling within a 30" circle placed around the visual center of the pattern (as in the right-hand column of the above chart), then do it a few more times and take an average."