Has anyone tried any of the Accelerator? ammo in an M14 type rifle? It was made by Remington. It has a .223 round encased in a tan plastic sabot, in a .308 case. Was just wondering if this would do anything too funky to the gas system/op rod. I believe they promoted velocities of almost 4000 fps, but do not remember any of the pressures involved. Any info would be appreciated.