It's perfectly fine for shooting upland birds and small game with lead shot. And, if you only hunt migratory birds occasionally, you can use tungsten matrix or bismuth shells. These lead substitutes can cost as much as $10 a box more than steel, but who cares unless you plan to shoot over water a lot (How many boxes of shells do you go through for duck hunting purposes in a season?)
EDIT:
What am I talking about??!!??:eek:

Check the chamber length. If it's 2 1/2", disregard what I said above about lead substitutes - you won't find them in anything shorter than 2 3/4" shells. Also, if the chambers are 2 1/2", you have to be careful about using ANY modern ammunition employing smokeless (nitro) powders. Low pressure nitro or black powder only through most of those older guns.