I to like the federal. I tied numerous winchester and remington loads this year and the federals patterned best. I too have an hs undertaker choke and it is great, I had a tru glo and would never buy one again they suck. this is what I found using a mossberg 500 with 3" shells the remington nitro and winchester super x shot about the same. Only a few pellets difference. I think the winchesters shot just a little low and the remingtons a little high. I was testing all shells in #5 shot at 20, 30, and 40 yds. The winchesters and remingtons lost there patterns at 30 and 40. Dont get me wrong they still patterned enough to kill a turkey but the federals just did a much better job. I have heard that a ported choke ( the ones with holes in them ) can affect the flight of the federals wad, all I know is I switched to an HS undertaker and it made a huge difference.