I have a Nova and also tried the Undertaker and was very disappointed. I also tried a couple of other chokes and settled on the ported TruGlo. I shoot 3.5 inch Winchester #5 and get an excellent pattern out to 40 yards. It also patterned very well with the 3 inch shells. There might be better combos out there but this one works well for me. FYI, I also use the HiVis adjustable sights.