Super Waterfowl chokes are extended, knurled and have a black oxide finish. they are available in three degrees of full choke- .030, .040, .050 and were specifically designed for use with steel and other environmentally friendly shot. This is the ultimate choke for LONG RANGE pass shooting of waterfowl. All Super Waterfowl chokes are manufactured from a unique grade of alloy steel that has a strength level of approximately twice that of 17-4. They are marked on the head with the degree of choke and on the body with the exit diameter.
The below chart shows the relationship between the degree of choke, the percentage and constriction based on lead shot. Keep in mind that the percentages are a guide only. What you actually want is a pattern that is dense enough to insure multiple hits on your target at the distance you normally shoot.
Lead Shot Choke Chart
CONSTRICTION PERCENT
CYLINDER .000 40 at 40 yds- 70 at 25 yds
SKT 1 .005 45 at 40 yds- 75 at 25 yds
IMP CYL .010 50 at 40 yds
Skt 2 [light mod] .015 55 at 40 yds
MODIFIED .020 60 at 40 yds
IMP MOD .025 65 at 40 yds
FULL .030 70 at 40 yds
EXTRA FULL .040 73 at 40 yds
TURKEY .045 + 75+ at 40 yds
Keep in mind that this chart should be used as a starting point only. Select the choke and pattern it. Change chokes or loads as needed to get the pattern you want. If you do not pattern your gun please feel free to accept this chart as being infallible.
