I am going to have to get a box or two of sabot slugs to try in my open choke smooth bore, although I would fully expect the accuracy to be dismal. The 120 mm smooth bore guns mounted on several modern battle tanks are extremely accurate, well under MOA, and although there is little relationship between a 12 gauge sabot slug and the 120 mm fin stabilized discarding sabot kinetic energy round, it would still be interesting to test. According to Ackley, as much as 30% of the energy from a rifle cartridge is lost to induce spin to the bullet. Artillery rounds have always been at the cutting edge of technology and only recently have we seen this extend to small arms ammo in the design of bullets with shorter bearing surfaces and banded bullets resulting in higher possible velocities. Cutting edge stuff in 1914. It would be interesting to chronograph and compare the velocity of these sabot shotgun slugs from both a smooth and rifled bore gun.