Chuck are you digging or trying to separate the rocks from the dirt?
For digging in rocky soils, the bucket needs teeth, that will be handy also with your clearing also.
For screening the rocks out, the "skeleton" or "rock bucket" require's shaking and depending on your soils that the your trying to separate, very dry helps. Small roots and organic matter along with any clay soils will only plug up the bucket. I borrowed one and was not impressed at all, and that was on a SS with much faster bucket "shaking" ability than a tractor.