I know this is off the wall question, but do any of you hunt around cougars or mt lions or any animals or situations you are concerned about?
Do any of you carry anything for self defense?
Can you shoot buckshot through a turkey choke? (not for turkeys).
My choke said lead or hevi but the only thing it said not to was steel.
As some others have stated, it is also true that in Illinois it is illegal to have any other gun or any shot sizes larger than #4 in your possession while hunting turkeys. I have had encounters with wild dogs, a pack of 3 pit bulls and coyotes while turkey hunting. It can certainly be unnerving.
In all of the instances I've mentioned, except with the pit bulls, as soon as they realized that I was a person (I removed my hat and head net and stood up.) they left the area quickly. The pit bulls instead spread out into a semi-circle and advanced until I spoke forcefully to them and leveled my gun. They seemed to "think about it" and then ran off.
We have big cats here, both cougars and bobcats and a friend on neighboring property was stalked by a very large bobcat while deer hunting. I have not had that experience...at least I don't know that I have. The cat population here is growing very rapidly and more and more of us are seeing more sign and cats than ever. It is still illegal to shoot them in Illinois.
A 2 oz. load of #6 tungsten-based shot is quite lethal for any of those animals, if it's properly placed and at a reasonable range. That of course could be a problem, given the excitement that would probably be present in such a situation but that's my best suggestion. Changing loads under stress would not be a good idea.
Most lead shot can be fired through rather tight chokes. Slugs would very likely damage both your choke, your gun and possibly create a dangerous situation for the shooter. That would not be an option that I would choose and would strongly advise against it.
I hope that helps some.