Supposedly, the bullet itself was sub caliber for the weapon itself and held in a sabot, exactly like a lot of us shoot in our muzzleloaders....... It's called the 30-06 Remington Accelerator. The bullet in that load is actually a 55gr .224 (normal for use in .223/5.56) and was produced by Remington (may still be). It's a setup for varmint shooting at velocities way above standard 30-06 ammo at 4000 to 4500 FPS. That could account for destruction of the bullet upon impact with whatever it hit. I'm not speculation one way or the other but waiting for the case to play out in court.

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Where did you see/find that information?