If you use steel shot then you have to worry about what choke you have in the gun. If you look at the choke tubes that you can shoot steel in there will be two chokes marked on it. One is for lead and the other for steel. If the markings say Mod for lead then you have a full for steel. If the markings say full for lead then its X full for steel. You can damage your barrel if your not carefull.
Why give into the eco-nuts so easy? Why not do an education day about how the lead shot fears at gun clubs are over stated. Letting kids play on the trap field is no different than letting them play in a fork lift zone and we don't do either.
We use #7 steel and I shoot a 391 and bt100 same chokes for lead and steel and have not had any problems. We also have some guys shooting the big $$$ guns and no one that I know of has had any problems with there chokes
I have shot 2 3/4 inch 1 1/4 ounce hevishot no. 5 reloads on my last 4 duck hunts. On each of those last 4 hunts I have been knocking down ducks at ranges that shock me everytime I shoot one. I can knock down ducks at the same long ranges I can take doves with lead shot and a full choke. You don't really notice how bad steel is until you go back to heavier shot after using a lot of steel.
In 2008 our club resold 4 tons of #7 steel shot to members with no resulting barrel problems.
kolar guy - try it yourself and let us know what you think. Sounds like you're going to be on your own.
I've shot 15 thousand rounds plus through my 870 full choke and my Mach One which has a lead full choke in it - removable. I've had no problems. My screw in choke still comes out like it was new and my fixed choke just keeps smoking targets. If something bad was going to happen it would take pressure to make is so. Our loads are all tested and they are well below the limit.
My bro-in-law once repeated the rule about downsizing one full size choke for steel. That's what he heard... We don't see it in patterns. We don't have a Neil Winston style study on it because we really don't care after seeing our off hand tests. If we thought it made a difference, we might test it more rigorously.
We prefer lead any day of the week, but will shoot steel at our home club rather than give up the ship because of political events in the past. I hand loaded targets there as a kid and shot my Grandfather's old pump there. I ain't giving it up.
Fight like hell to keep shooting lead, but don't maintain the myths bout steel.
Scott Calhoun, If you look at your chokes that will answer your question. All the ones that I have are marked with two diff chokes depending on lead and steel. Go into your choke tubes and take a look at them and you will find the same thing.