Any break you keep the cue ball in play on, is a good break. You can practice the break all you want, but you need to realize that it's an unconrtollable demolition. None of the factors are the same, you'ld like them to be, but in fact they aren't. The balls are never in the same spot, you NEVER hit the cueball with the same speed, same English. The rack could be slightly skewed from the position of the last break. So what do you expect to happen? What is reasonable to expect?
I saw a guy that everyone said had a strong break... 3 times I saw him the ball was on the floor. Last I looked, you cannot shoot from the floor.
The balls won't come off the rail the same, they don't collide the same. So in a situation where you cannot get repetitive results, what are you practicing? Break cues? I have a phenolic tip cue that is a good breaking cue. As long as I maintain the ball after the break, that's my main concern. When you give up the cue ball, is when your break has failed.
JV