Infield Fly Rule - Ball Drops

[FTVMartin]

I called abatter out for this for this first time last week.

I saw him set up in the front of the box but didn't pay much attention to it. His stride took him about a foot in front of the box while a couple of balls missed badly low. This made me notice where his foot was. Then he swung and missed at the next two pitches, still way in front of the box. I made up my mind that I was calling him out if he made contact.

Next pitch he grounded to third and I called him out.

Of course coach argued but I showed him the footprint and he just *****ed that it wasn't a good baseball call. I told him it is a baseball rule so I made the call.

Question, how much should we let the batter get away with? I know that if any part of his foot is on the line he is good but how much past that do you guys go? In this case I felt it was way too far to let it go.