Free: Contests & Raffles.
Pheasants on release sites are wimps and are generally easy to knock down. I can't imagine regular steel shot not being effective if you limit your shots to about 35 yards. If you're not knocking them down then I'd blame it on the shooter, not the shells.
You only have to use non-lead on pheasant release sites. There are actually places in this state where you can hunt wild birds.
GO SHOOT SOME CLAYS WITH THE STEEL! You wouldn't target shoot your deer rifle with 120 gr bullets all year and then go out and shoot 180's without resighting it in (I hope), same thing for the steel shot. Different velocity shells will shoot differently, practice with what you will hunt with.