The word "Parrott rifle" is spelled with only one "t" in the titles.
Jamie manually smashes the bottles on an accelerometer to try to find out how much deceleration it takes to break them. That is useless. The results are all over the place, from 11g to 54g for the full ones and 11g to 33g for the empties. It does not even make sense to calculate an average from such a wide spread. This means the whole baseline on which they built the bottle smashing rig was flawed, invalidating all later results.