Yes. Don't bother. The spin of the rifling makes the shot come out of the barrel spinning, and when it separates from the cup, you get a spiral pattern on paper that simply continues to widen with each yard it travels. Its useful to about 10 yds., but you can get that kind of " accuracy" without the plastic cup.
Do a little math to figure out how fast that cup is spinning( and load) when it leaves the muzzle, and then travels down range at MV. It resembles the work of a high speed Drill. That works fine with solid bullets. Not at all with shot loads. :surrender: :hatsoff: