type of choke to use on m4

[hbschwartz]

i am a newbie to shotguns. i have a m4 benelli shotgun. i wish to shoot pdx1 rounds, which consist of a one ounce slug and three 00 buckshot. what choke should i use. thanks.

[12508]

I have used that round through the modified choke the gun comes with. No issues.

 

[Renault]

Mod or Improved Cylinder should be good.