Joules or FPS?

[shadowfacex]

I’m trying to stay as objective as possible, so I’ll add context here for reference.

I’ve only dealt with FPS when it comes to checking for compliance with airsoft organisers and site limits, however what I’ve noticed is that every RIF that I’ve ever owned (and it’s most likely an industry standard) had its energy output measured and declared solely in Joules, which makes it for a super handy reference.

For example, my CO² ASG CZ P-09 came from factory with 1.3J of energy output. You can probably tell at a glance whether it was or it was not hot for most sites.

I will experiment with Joules at PlayAirsoft and see how it fares in real life. If you happen to see any info being incorrect for a given site, I have added a “report” link. This should help with correcting any outstanding issues.

 

[Rogerborg]

All the sites I’ve been too have either used their own .2 ammo

Then (unless they're CQB with a 0.25g limit or so) they're wasting everybody's time by chronoing at all.  They're really chronoing bolt actions and HPA using 0.2g?

There's actually a potential legal issue there, given the possibility for guns to Joule creep over the 1.3J / 2.5J airsoft definitions, and become section 5 firearms, or air guns.

or asked what weight your using chrono’ed it then looked it up on a conversation chart

To be clear, I have no problem with that.  Well, I mean, I have a problem with trusting players - again, that's just chrono theatre - but having a handy-dandy chart with weights and fps limits makes practical sense.

My issue is really about how sites specify limits.  When I see a site saying (e.g.) 1.2J AEG / 1.88J DMR / 2.32J bolt action, that's all I need to know to set up for that site by chronoing at home with the ammo weights that I'll be using.

When they say 360fps / 450fps / 500fps, I have to go through the pointless step of converting those numbers to Joules, for no good reason at all.

Worse, if they're thinking in terms of 0.2g, then it can lead to them using 0.2g for chronoing, with the aforementioned pointlessness and pitfalls.