Originally Posted by pestobanana
Joule creep really shouldn't be new news to anyone at this point. There are an unlimited number of ways to cheat the chrono. Swapping barrel groups, shimming the hop up, power up suppressors, cylinder swaps, quick spring swaps, adjustable spring guides, using different gases, adjusting gas pressures, adjusting NPAS units, swapping valves, swapping bolts, cranking the hop up... At the end of the day, the only real way to catch people cheating is to constantly spot check on the field while carrying a chronograph and scale. The point of a chrono reading with hop up off is to negate the most basic way for someone to cheat the chrono. I can drop my gun down from 390 to 200 FPS simply by cranking the hop up.
Actually this is a pretty good point... who is to say that after they chrono your gun, you can't go back to your private room to do a quick spring change or something?
I would recommend placing a sticker similar to the "warranty is void if seal is broken" sticker on the body of the gun that is required to be disassembled, where if there is signs of tampering it may mean that something has been done to the inner workings of the gun that affects FPS, but because each one dismantles differently it wouldn't be feasible. I don't see hop-up adjustments having that significant of an impact on the FPS, but other things like NPAS, barrel, and spring changes do have a big affect on fps. For example, staff would slap a sticker on the line that connects the upper and lower receiver (in AR platforms for this instance). If someone were to tamper with the npas or swap barrels, they would have to "field strip" the gun, and the broken sticker would indicate that something had been tampered with.
Forgive me for going off topic, but pesto does raise a good point.
Perhaps they should start installing cameras in all locations if this is such a pervasive issue as an alternative solution.