I am using a primos jellyhead choke tube (I am using a remington 870 SPS-T) and I have had excellent results. I am shooting a very nice tight pattern out to about 50 yards or so. The thing is when trying to find a choke, you may have to try several different ones before you find the one that seems to work the best. You will also have to try several different shotgun shell brands, loads, etc. Each combonation of shell and choke will produce different patterning results.