EAA Research Consultant
Join Date: Dec 2004
Location: Route 66
If I understand correctly, hollow ground means the concave grinding out of the face of a blade, creating a notably stronger cross section, much as with the I beam in steel girders.
Fullers are drawn linear grooves placed in the blade at time of forging I believe, and the differences in these have been incredibly hard to grasp as the terms have often confusing definitions. The notion of 'blood gutters' has been one of the most off center notions of all.