I haven't turkey hunted in years, so I didn't know that. I use 3.5" #5's anyway.You would have been right until a year or two ago. They reinstated that #2 was legal for turkeys in AR. Scares the bejeebers out of me knowing that someone might shoot me with those! A load of #4's would be bad enough.
Never did hear, or there never was proffered a reason for the change.
Whatever happened to "Positively identify your target before pulling the trigger"??And the most dangerous thing out there is not #2 shot but so called "peckerwoods" who will try to steal your bird or get between you and your bird. Scout well, get off the roads, and if you hear someone working a bird them leave them be. No turkey is worth getting shot or shooting someone else over.