May not be a new idea, but I love shooting rubber blunts at stumps and such. I just switched to wood from carbon and was trying to figure out how to get adequate weight from a rubber blunt. I shoot a 160 field point and broadhead. A rubber blunt is approx. 100 grains. What I did was take a dremel tool to a 125 glue on field point. I cut the pointy end of the field point off just in front of the internal taper. It was now basically a steel blunt, more or less, that weighed 80 grains. I then glued the point onto a wood arrow. Finally, slip the rubber blunt over the steel point and wahla, a 180 grain rubber blunt. YEAAAAAAAA!
Bret