If it's an old shotgun, it may not accept interchangeable chokes. But that is ok. Use it in honor of your deceased uncle. My favorite turkey gun is my 1978 model Remington 1100, and it has a fixed Modified choke. I'm just careful to get that gobbler in close before taking the shot, much like getting a bull elk in close for a bow shot. That's a big part of the addictive nature of the sport.I really have to say everyone is so helpful and I really appreciate that. To be honest the shotgun was my uncles which has passed a few years ago and don't know a lot about it. I will take a look at it when I get home and see what choke is in it.