First off the gun is a great gun for turkey. I don't know for sure if you mean you have a modified choke tube or a barrel that is fixed to modified. Either way I would NOT recommend shooting turkeys with that. At least a full choke, or even better a special turkey choke. You can kill one with a modified but the pattern gets to be to big to make good clean kills at certain distances. If you barrel accepts chokes, email me. I have a good turkey choke that would fit in that gun. Paid $50 bucks for it this fall and I have two identical ones (long story), but maybe would could work something out for the choke.