The field's kind of kidney bean shaped over all.
I just go the center of it (center of it the short way) make one long pass - make a little mess turning around and do another pass on the side of the first, then again on the other side.
It's a little tough getting it started to the point where you can turn at the ends freely wihtout trouble, but I find that's a small price to pay.
Then as I cut, it's easy to visualize if you're too close or too far from the field's edge, and make minor adjustments as you make each pass.
Those minor undercuts in spots add up on each pass and eventually you get to the shape of the outer edge, and haven't lost all that much time.
Less time than driving over cut grass to get to loop around at each end.
Kind of hard to describe. basically just an outward oblong spiral that you're constantly adapting in small increments. But very easy to do once you get it down.
Keeps the cutter in the grass and cutting at all times. No lifting.
Overlapping a little over cut grass on the inside doesn't seem to jam the cutter the way it does on the outer end of the bar - for some reason.