I guess I was asking for a description -- for instance, digging with hydraulics only, digging with bucket down and wheels driving, ???? I see a lot of digging happening with FELs that is a bit beyond what an FEL should do. It's not a bulldozer.
Typically, anti-stall will keep the engine from tripping and stalling under momentary overload. If you run the front bucket into an immovable object and the wheels don't break traction, the engine will stall even with an anti-stall system (something has to give).
I guess if I stalled the engine four times trying to dig, I'd take a hint and try a different technique. With a front loader, it is generally a lot safer to dig with hydraulics only, as you will hit a relief before doing damage or stalling the engine. If you dig by driving forward with the wheels, you can damage the loader arms and/or stall the engine. The only time I dig with both hydraulics and forward motion is when nosing into a pile of loose material or when I know the ground I am digging in is not too hard.