Okay, I've been working on designing a custom mold cut for a 410-gauge shotgun slug and need some help with the principle of "Drag Stabilization". Many shotguns are smooth bores and thus shotgun slugs in order to dependably fly straight must have a drag-stabilized design. They can not depend on any rotational spin imparted by rifling for stabilization, which is the normal method of bullet stabilization in flight used by most firearms. So I've been lathe cutting prototypes and testing them for stability in flight, but need to have a few questions straightened out: 1~ For a slug design made entirely out of a single material (cast lead alloy in this case) is it correct that a test model which is cut to the exact same dimensions but made entirely out of a different material (hard-wood in this case) will exhibit similar behavior in flight. Problem I'm having is that when dropped from about ten feet up in random positions into a bucket full of soft putty my lead prototypes give no consistent or interpretable data as to whether they land nose first. Wooden prototypes on the other hand show definite results. I believe that the lower density material model is behaving at low velocity how the higher density material model would behave at higher velocity --- Is that line of thinking correct? 2~ To more thoroughly test my high density (lead) prototypes I am considering constructing an apparatus consisting of a clear plastic pipe of a diameter of about 3-4 inches with a fixture to hold a prototype at its center of mass inside so that the prototype can be rotated via. Finger pressure within the tube and force feedback in the form of touch sensation on the finger can be felt. A high volume gas engine powered water pump (such as those used to pump out ditches, basements, ect., in the construction trades -- one of which I happen to own) would be attached to one end of the pipe and a continuous closed loop of water flow would be achieved via. a return pipe and a water reservoir consisting of a 40 gallon trash can. I'm thinking that the water flow as opposed to airflow will simulate the projectile’s flight through the air at much higher velocity then the water flow in the apparatus. I know that some boat hauls are designed using wind tunnels so I'm thinking the opposite might work as well in order to simulate higher velocities with low velocity experimental apparatus. 3~ All the drag stabilized factory slug designs I have examined (cutting open factory loaded ammunition and retrieved the slug) have clearly shown that a drag stabilized design must be "nose-heavy" and usually hollow base. Surely there is a little more too it then that. What other factors come in to play?