has anyone tried to smooth bore a sabot round for the big 50? the idea that was passed to me was to custom form a finned perpetrator and sabot it through a 50 bore. the fins would have to be angled to produce spin and stabilize during flight. the military used to have howitzers with smooth bores to get velocities of up to 4700fps. the idea would be interesting to micro size on the 50 case. the projectile would have to be shaped like the RPG round to keep center mass ahead of drag. any thoughts or has it been done?