My experience with older FEL's is that they are much better suited at moving dirt rather than digging. I have known folks dig a decent hole with the slip scoops, though.
X2 - I'll use my box blade at a high angle or a pond scoop to 'dig' - then use the loader to scoop the loose dirt.
Trying to dig with a standard FEL on a tractor is asking for trouble. They're not made for that.
Now a properly set up skid steer? Different story.
Dale
"When tempted to fight fire with fire, remember that the Fire Department usually uses water." - anonymous