We always cover in pre-game
 

what we will do in case of unsure call. Solution always is: blow whistle, make eye contact with partner(s) (this is signal I need help). No call from anyone means conference. If we can't decide after the conference, AP. We have only had to go to AP one time. No complaints.

There's some difference.
 

One team gets the ball, but at the cost of their possession arrow advantage.

Sometimes with a little pause, the players will help you out. If I didn't see who tipped it, but everybody is starting to head the other way, we're going "That way!"

Very Well Stated CaliOne!!!!!!

ok maybe that wasnt the best choice of words on my part it really wasnt meant to be a bad thing towards the rest of you, kinda the opposite meaning I was looking for. Just didnt word it right. I know its not a big deal we all make our own choices and make up our own minds on many different plays through out the games we ref. thanks for the info on my question. CMS

I've learned that you can tell a lot just by watching the reactions of the players. I had one in a tourney a few nights back. Ball went out on side and my view was partially blocked. I was 90% sure it was white ball. I gave my partner a look and he let me know he discreetly let me know he didn't see it. I watched the movements of the players of both teams and they confirmed I was right. I gave it to white. I have to have no idea and not even a strong suspicion to go to the arrow. But if I go to the arrow I sell that call. I once heard a clinician say once that about 50% of OOB are guesses at best. I think he overstated his case, but there is an element of truth in it.