RE: Chrony with bp.
That's what I thought too. The most recentChrony I ruined with a sabot was about 10 - 12 yards away. I'm thinking those sabots must flare out and drop back earlier than that - may only a foot or so from the muzzle. They tend to follow the bullet, I'm sure, for quite a distance. But not real consistently. It was surprising how much force they still had left. I'm not sure if 3/8" plywood would have stopped it.