Or using a freak bored barrel. Only time I get double feeds is if I double pump.
Paintball changed for me twice in my life, when a close friend introduced me to pump play and cockers and when I went from woodsball with Tippmanns to tournament ball with my Bob Long Rapper and AKA Viking on the UW-Stout Team. I'm a better player thanks to both occurrences.
I def would recommend going with either a freak bored barrel or a full control barrel like a Lapco. The detent rings are super fragile and IMHO i think they increase the likelihood of breaks because the second they become mis-formed you arent dealing with a perfect circle any longer. If cost is an issue for you they will do the trick until you can afford one of the other options.