I've gone through close to 30k madbulls through 5 or 6 different guns in the last 3 years, using them every weekend, and I have yet to have a problem with them. All my guns had stock barrels, and they all shot well. Perhaps they don't work well with tightbore barrels?
I haven't noticed a major difference between madbull's and BBB in aeg's with stock barrels, but I have noticed that madbulls get nicked and dented when they are loaded into WE M4 mags, and BBB don't.
Every word ever written will fall short, of it's intent
Even sung, or spoke, or screamed, they will betray what they had meant.