Also check into the "hevi-shot" type of ammo, about all the companies are now making a Hevi-shot turkey load. Since you are shooting a Rem. I would look at the Remington Ventilator choke tube, I shot one for years and was very pleased with it, its a .655 restriction, worked great with my 870 as long as I shot lead shot and they are not very pricey at all. I think it might be just a little to tight to shoot hevi-shot thru though.