Fed mag shot or winchester longbeard xr

[buckmaster27012]

shooting a rem 870 3.5" with kicks gobblin thunder .665   looking for opinions of what people see shoot better with this setup. like to use #5 shot, the fed have 1/4 oz more shot but less velocity is about the only diff. that and of course the price, i d/k why but lb xr here are 30 a box, kinda expensive to just buy and shoot a couple for pattern to see what is better. my buckshot choke tube from kicks shoots better with federal shells but not sure how fed will perform in the turkey shells. just looking for suggestions. thanks