The Stoeger O/U uses the Winchester/Browning Invector style chokes. We make several turkey chokes to fit your gun.. It is hard to suggest a choke to you without knowing which ammo you plan to use. This is why we have so many options, as they pattern better with certain loads compared to others. I can tell you our most diverse turkey choke for your gun is item# 19892 which is a .660 turkey choke.
Winchester 1300 uses the Winchester/Browning Invector style chokes. Correct choke would be #70100.
The SX3 uses the Browning Invector Plus (BIP) style chokes. Correct item is 70140
There is several varaitions on a AL 391 and they can use different choke systems pending on the year and variation. Use the info below to help you idenitfy which choke you have. Or you can call Carlson's for assistance.
https://www.choketube.com/cmsAdmin/uploads/chokeid_ber_ben.jpg
Beretta/Benelli Choke Tube System Identification
Pic A) Standard Beretta/Benelli (Ber/Ben) Mobil Choke: - It can be identified by measuring flush mount choke tube. The flush mount chokes in this system are 2” long and have threads located at the muzzle end of the choke (top of choke where choke notches are.)
Pic B) Beretta Optima Plus/Benelli Crio Plus: Identified by measuring a flush mount choke tube. This choke system is 2-3/4” long & the threads begin 3/4” from the muzzle end of the choke. These two chokes have identical outside dimensions, however these chokes are based on two different bore diameters and should not be interchanged.
Pic C) Beretta Optima/Benelli Crio: - It can be identified by measuring a flush mount choke tube. It is 2-3/4” long and threads are located at the muzzle end of the choke (top of choke where choke notches are.) The Benelli Crio was in very few guns and is no longer being put into shotguns. Once again these two chokes have the same outside dimensions but are based on different bore diameters and should not be interchanged.
Pic D) Beretta Opitma HP: - It can be identified by measuring a flush mount choke tube. It is 2-3/4 long and the threads begin about a half-inch down from the top of the choke. This is a New choke system that you find in the A-400 Xplore shotguns.
This gun uses the Ber/Ben Mobil style choke tubes. Our item#19592 is our best all around turkey choke that performs great with all turkey ammo on the market. We do make other styles of turkey chokes that can optimize brands or other pellet sizes. Would have to know the load to see if you can get tighter patterns with another option.
The SBE 1 uses the Ber/Ben Mobil style choke tubes. Our best all around turkey choke with any and all turkey loads is item#19592 which is the extended .665 turkey choke. We do make other styles and tighter chokes for other ammo if interested.