I got to find a no tox load for my 20ga. I hunt a lot of WPAs so I gotta figure out what to use and pattern it. Maybe I should just start shooting steel for no tox.
I would agree. You shouldn't have any problems killin' pheasants out to ~40 yards with 20ga 3" 1 oz. loads of #3 or #2 steel (choked appropriately), IF you can put the pattern on the front end of the pheasant! If you must take longer shots, a 12ga with 1 1/8 oz. of #2 steel would be the way to go.
Here are a few of my 20ga pattern numbers (with the chokes I usually use) to give you an idea of the kind of performance you might get with these loads.
Pattern numbers from a 20-gauge Browning Citori with 28" Invector-plus barrels and Briley flush chokes (patterns average of five, 30" post-shot scribed circle, yardage taped muzzle to target, and in-shell pellet count average of five).
20 GA 3" ESTATE STEEL LOAD
1 oz. #3 steel (147 pellets) @ 1330 fps
30 YARDS -- SK / pattern 120 (82%)
40 YARDS -- IM / pattern 111 (76%)
20 GA 3" WINCHESTER DRYLOK SUPER-X STEEL LOAD
1 oz. #3 steel (145 pellets) @ 1330 fps
30 YARDS -- SK / pattern 114 (78%)
40 YARDS -- IM / pattern 106 (73%)
20 GA 3" REMINGTON NITRO-STEEL MAGNUM LOAD
1 oz. #2 steel (118 pellets) @ 1330 fps
30 YARDS -- SK / pattern 101 (86%)
40 YARDS -- IM / pattern 99 (84%)
Good luck!