When it comes to getting good shot patterns do you guys recomend getting the 870 turkey gun or a standard 870 with a longer barrel? I've heard people say that the longer barrel will give a tighter pattern but I was wondering if it was just personal preference or if it really made a drastic difference. I'm thinking that the 21" barrel on the turkey gun would make it much nicer to carry and with a modified choke it'd make a good squirrel gun also.