What's the constriction on the Carlson's Dead Coyote choke tube?

[derbyacresbob]

I went to the Shot Show last week and talked to Shane Carlson at the Carlson's Choke Tube booth. Shane told me that the Carlson's Dead Coyote Choke that fits Remingtons is .660.

 

[ohioyotehntr]

What about the Mossberg 500 tube? I have a 535 Tactical Turkey and get pretty good patterns with 3 1/2" #4BUCK.

 

[VaHowler]

Mine measures .660. My 1187 patterns better with a .665 Mad Dog turkey choke.

 

[loogin28]

I have a Rem 870 and the ported Carlson Coyote choke measured with digital vernier caliper was .667. It didn't pattern that great for 4 Buck, I use an Extended Pattern Master,however for #5 Turkey load the Carlson throws a good pattern to 45 yds. Always wanted to try a Jellyhead but having trouble finding one.