J&J ceramic was too large a bore size, the ti boomstick worked just dandy
Shell was too thick
I shot a case of this at the MIchigan Monster Game (though it was disguised as Exotic Sports "Fireball") and they worked great. At the start of one game a malfunction in my gun caused me to chop every other ball, but as soon as I had screwed the reg screw in a 1/8 of an inch (darn sensitive autocockers) I experienced no breaks. Unfortunately there were more occasions than i could count where I was hit with one of these and they didn't break. I think I may have had more "no breaks" than legitamate hits. Anywho, they flew straight and true, but wouldn't break at farther than 50 yards.