30gr slug vs. Caldwell Chrono

Had a little freak accident today. My new Caldwell chrono was mounted on the tripod that it came with, and the hinge that mounts it wasn't tightened down enough. Just as I shot, gravity said hi. The 30gr NSA ricocheted off of the top of the unit, then jumped 40 degrees upward and penetrated through the wall into the bathroom. The chrono still clocked it somehow (at 920fps) :/

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I don't see a chronograph that has been shot but a serious safety issue

maybe I'm over reacting but when you shoot through walls that is bad

These aren't exactly children's toys and things will happen regardless of how many variables are removed. There also wouldn't have been any way to stop the projectile in this freaky edge case scenario. The chrono literally rotated under its own weight on the rotating hinge of the tripod that it came with. The center of gravity of the chrono on the tripod isn't centered, and the plastic knob on my unit to tighten the rotating hinge is finicky, but it was not (over)torqued down and had enough play to slip.

There's a 4'x4' backstop behind the 10 gallon bucket full of rubber mulch that I'm using for a trap. The backstop is situated directly behind the trap more as an extra fail safe. The issue came down to that rotating hinge on the tripod holding up the chrono. The chrono is situated in front of the muzzle and right in front of the trap. 

From here on out I'm not going to use the tripod. I didn't care for it much when I got it. The legs don't really stretch out as far as I would have expected them to for an application such as this. While I have a good, solid Manfrotto tripod that i could use - I have already rearranged the setup so that the chrono rests statically, thus removing any variables for dynamic movement (an earthquake would have to hit in order for there to be any movement of the chrono).