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For the pattern. Look at the spec's of kick buck shot chokes. Carlson shows the turkey spec's but not the coyote choke tubes. (Do not shoot steel shot out of either tubes)
Here is the Turkey choke tube spec's
EXTENDED TURKEY CHOKE TUBES
The Extended Turkey choke tubes extend approximately 1 inch from the end of the barrel. They are manufactured from 17-4 heat treated stainless steel had have a black finish. These chokes feature a 1.05 parallel section designed to produce the optimum pattern with your shotgun and favorite turkey load. NEVER shoot steel shot through any turkey choke. Lead, Copper, Nickel, Bismuth, and Hevi-Shot can be used in any Carlson’s Extended Turkey choke. See Chart below for suggestions on choosing the right turkey choke.
Turkey Load Size
Choke System #4 #5 #6 Card/Block Shooters
Remington 12ga .670 (#19584) .660 (#19583) .660 (#19583) .640 (#19585)
WIN/Invector 12ga .670 (#19893) 660 (#19892) .660 (#19892) .640 (#19894)
Ber/Ben Mobile 12ga .665 (#19592) .650 (#19591) .650 (#19591) .640 (19590)
Ben Crio Plus 12ga .675 (67001) .665 (#67002) .665 (#67002) .665 (#67002)
BIP 12ga .680 (#19882) .665 (#19881) .665 (#19881) .655 (#19880)
Moss 835/935 12ga .690 (#19871) .675 (#19870) .675 (#19870) .675 (#19871)
Tru Choke 12ga .670 (#07060) .665 (#07059) .660 (07058) .640 (#07062)
Ber Optima Plus 12ga .683 (#64098) .673 (#64099) .673 (#64099) .673 (#64099)
This chart is to be used as a starting point; there are exceptions for every shotgun and load.
Carlson does also manufacture the 12ga turkey chokes in a ported style. Carlson’s Ported Turkey Chokes have horizontal slot ports allowing gases to escape quickly reducing recoil and muzzle jump. The ported choke tubes come in the best all around patterning constriction for each model of gun. These ported choke tubes extend about 1” from the barrel and come in a matte black finish.
This is the Coyote choke tube they suggest for #4 buck for tight patterns
CARLSON'S COYOTE CHOKE TUBE
Designed for use with Hevi-Shot but any lead, nickel, or copper platted load can be used, this high performance choke tube has been specifically designed for the coyote hunter to deliver devastating down-range patterns upwards of 70 yards when shooting Dead Coyote “T” shot. We find that the Dead Coyote by Hevi-Shot, Heavy Weight Coyote by Federal, and #4 buck pattern the best through this choke tube. This tube is not for use with Steel shot. The Dead Coyote choke is also a great waterfowl choke for those hunters using Hevi-Shot loads for long range shooting