wait a minute, why do you want to add screw in chokes??? try some hevishot from the mod. choke, and i bet you can get a turkey killing patten at close to 40 yrds with it. a friend of mine set up, and painted a wally world NEF 12ga with a 28inch mod choked barrel for turkey. without hevishot he gets about 20-25 yrds, with hevishot he get 35 yrds, the only thing done to the gun was a recoil pad, a scope base, with cheap $29.95 red dot also from walmart :eek: :eek: :eek: yep its sad to say, but i spent ALOT of money on my NWTF 12ga, and i only get about 40 yards with it. he has like $125 in his whole gun all set, and with hevishot, he get almost if not as much as i do out of my NWTF 12ga. that is tweeked out. so before you spent all that cash, try some hevishot, it really is the best shotgun ammo i have EVER TRIED.