Choke Spread And Yardage


Hi Bruce,

I found this table explaining choke patterns and designations.

Looking at the table which I copied and pasted below, is it correct to assume that an “extra full” choke would command a 70% shot hit ratio inside a 30 inch circle at a distance of 45 (forty five) yards?

Thanks!

–Spinacia

—————————————————————————-

Seventy Percent Desired Pattern Per Choke Designation

CHOKE. . . . . . . . . . . . . YARDAGE OF RANGE

Theoretically 70% of the shot will hit inside a 30 inch circle

————————————————————————
FULL . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 Yards
MODIFIED. . . . . . . . . . . . . . . . . . . . . . . 35 Yards
IMPROVED CYLINDER . . . . . . . . . . . . .30 Yards

CYLINDER. . . . . . . . . . . . . . . . . . . . . . . .25 Yards

Dear Spinacia,

Extra Full 70% at 45 yards? That doesn’t sound unreasonable. A choke gives up about 10% each 5 yards. That is, if your particular choke and shell combination gives you 100% at 20 yards, it will shoot 90% at 25, 80% at 30, 70% at 35 and so on. As with anything in shotgunning, the ration isn’t hard and fast or 100% perfect, but it’s in the ball park. This fits in with the numbers you use below, which means that there are at least two of us who agree on something. If that Extra Full could print 80% at 40 yards (very possible), then 70% at 45 is right about on.

One thing you should be aware of, just because some choke is stamped “Extra Full” doesn’t automagically mean that it will print tight patterns with every shell. You simply MUST pattern test to know what you have. It is very common for tight chokes to perform poorly with large shot. Large sized shot often performs best and patterns tightest in medium constriction chokes. You just gotta pattern if you want to know for sure.

Of course, most shooters don’t want to know for sure, so they ask people like me. Then they REALLY don’t know for sure. I thrive on confusion. It keeps the facts from becoming too important.

Best regards,

Bruce Buck
The Technoid writing for Shotgun Report, LLC
(Often in error. Never in doubt.)

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