Remington says:

"Due to the hardness of Wingmaster HD and other tungsten based shot material, we do not recommend using Hevi-Shot in our firearms made before 1950. You should only use firearms that have choke tubes that are recommended for use with steel shot."

They also reccommend no tighter than a Modified choke. The above applies to steel shot, as well.

 

Back when steel shot was first mandated, extensive testing on tight choked shotguns would sometimes show a bulge near the choke on full choked guns. Many experts said that as long as your choke was not full there was no problem shooting steel. I have shot many steel shot shells out of an older 12 gauge 1100 with skeet choke. I would just make sure your choke is skeet, and measure it. Some older shotguns actually are tighter choked than the designation on the barrel. Sometimes it is because when produced during the paper shell era with the wads then available a tighter choke produced the desired results.

My next piece of advice may be troublesome to a few, but you could also have the barrel sent out for choke tubes. If you have no intention of selling this shotgun, and just want to shoot it that would solve everything. In my opinion, if you like shooting this shotgun and have to use steel, then that is an option. I have seen a few model 12 Winchesters so modified and they had zero problems. If your a collector then this is not for you.

 

have shot alot of steel #4 and 3's through a 30" full choke 1100 with no problems

 

Mississippi can you elaborate on a lot of steel

I have a 1976 gun mod choke and want to shoot either steel (it's cheaper ) or the hd...
The damn HD is like $3 a round

 

You can shoot steel shot up to a modified choke. Only problem with steel shot is full choke only. Modified on down is fine.

 

High Standard hit the nail on the head. Shooting steel or Hevishot through a full choke gives very poor patterns, anyway.