Choke tubes are a firearm accessory, and getting one wrong on a Beretta A400 isn’t just a performance issue — the A400 series (along with the 692, DT-11, and SV10 Prevail/Perennia) uses Beretta’s Optima HP thread pattern, which is thinner-walled than the older Mobilchoke standard. A tube built for the wrong pattern can bulge or fail to seat correctly, so fitment comes before anything else.
Constriction basics for steel shot
Steel shot patterns differently than lead, and most manufacturers recommend opening up your constriction compared to what you’d run with lead loads. A tube labeled for close, decoying birds is typically comparable to Improved Cylinder or Light Modified, while a tube built for higher passing shots runs closer to Improved Modified or Full. Going tighter than necessary with steel can actually degrade your pattern rather than improve it.
Options built for the Optima HP pattern
- Muller Chokes makes Optima HP-pattern waterfowl tubes in two main constrictions: a “DECOY” option (comparable to Improved Cylinder/Light Modified) for close decoying work, and a “PASSING” option (comparable to Improved Modified/Full) for longer passing shots.
- Carlson’s Delta Waterfowl chokes are machined from 455 Carpenter Steel specifically so they hold up inside Beretta’s thinner-walled Optima HP tubes without bulging; their Long Range tube is built for shots past 50 yards.
- JEBS chokes are a common recommendation among waterfowlers — hunters frequently point to the 685 as their tightest option for long-range passing shots and the 695 for closer decoying work.
- Beretta’s own factory chokes get real praise too — several experienced waterfowlers report the factory tubes are hard to beat without spending on an aftermarket option at all.
Buying tips
- Always confirm Optima HP compatibility before ordering — the A400’s thread and wall thickness is not interchangeable with older Beretta/Mobilchoke patterns.
- Pattern-test any new choke with the actual steel load you plan to hunt with; published constriction equivalents are a starting point, not a guarantee for your gun.
- Buy choke tubes through a licensed firearms retailer or the manufacturer directly, and follow all local and federal regulations for hunting equipment.