"Q. Can I shoot steel shot in my Browning shotgun?
A. 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 "ringe bulge" just inches behind the muzzle. The damage to your gun is purely cosmetic, but the "bulge" can be a factor in resale, especially with collector-grade shotguns.
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.
DAMAGE: In not all, but a number of instances a very slight ring will develop about 1 1/2" to 3" rearward of the muzzle. This ring is about .005 of an inch above the plane of the barrel, completely encircling the barrel. From our tests we could determine no adverse effect on pattern or shot velocity because of this ring. Our conclusion is that the most significant objection, the slight ring, is entirely cosmetic. This "ring" effect does not affect the function or safety of the firearm.
YEAR OF PRODUCTION: Nearly all Browning firearms manufactured after 1975 have two letters in the serial number. The two letters indicate the year of manufacture: M=0, Z=1, Y=2, X=3, W=4, V=5, T=6, R=7, P=8, N=9.
FUTURE: Obviously, we have no control over the ammunition companies and the loads they will produce in the future. So, if in doubt, please check with us or the ammunition company before using new loads in your shotgun."