straight from browning:
Answer:
READ THE ENTIRE ANSWER BELOW BEFORE USING STEEL SHOT IN ANY FIREARM
All current Browning shotguns with the Invector or Invector-Plus choke tube system are fully steel shot compatible with current factory loads. However, there are limitations to the compatibility of many older Browning shotguns with conventionally choked barrels. In certain models, shooting steel shot may cause a slight "ring bulge" just inches behind the muzzle or irreversible damage or harm to the shooter depending on the firearm. Accordingly, our recommendations concerning the use of steel shot in Browning shotguns is as follows:
1. WILL ACCEPT ALL CURRENT FACTORY STEEL SHOT LOADS:
All Browning shotguns with the Invector choke or Invector-Plus tube systems, However, we do not recommend the use of Invector full or extra full chokes with steel shot. They pattern too tightly, and sometimes result in a "blown" pattern.
2. WILL ACCEPT ALL CURRENT FACTORY STEEL SHOT LOADS EXCEPT THOSE WITH T, F, BB AND BBB SIZE SHOT:
The B-2000 and B-80 shotguns with conventional chokes (Non-Invector)
3. DO NO USE ANY STEEL SHOT LOADS:
The Belgian-made A-5, Superposed, Leige, and other Belgian Over/Under models, Double Automatic, American-made A-5 and all other models not listed in category 1 or 2. Note: Belgian Auto-5 barrels are interchangeable with the new Invector barrels which are made in Japan. With this new Invector barrel installed on the Belgian-made Auto-5 receiver, steel shot loads can be used. (Shown below, Begian Superposed Over and Under.)
