Quote:
Originally Posted by Viperfish
duster is always the best option when trying to get the fps down.
as for gas guns, i always heard you are supposed to chronie with the weight you will be using. something about how its not really effected by the weight.
Around here everyone knows i shoot 36s with mine and when using duster on even the hottest summer day it is still slow enough to take to prz
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That's actually a really ass backwards way of doing things. The point of chronying guns is to make sure that you're not hurting people with the joule output of your airsoft gun.
With that in mind, the chrony rules are based around AEGs and Spring operated guns. These guns follow the principle of "it is safe, outside, if it shoots under 400fps with 0.20g BB's, as 400fps with 0.20g BB is equal to 1.49 joules."
The joules are the part which hurts, as this is literally the energy the BB carries at the muzzle (eg, a point blank shot).
AEGs and Spring operated guns firing at 1.49 joules do not increase in joules as the BB weight is increased. So a gun which fires 400fps with 0.20g, and 298fps on 0.36g, still has the same 1.49 joule rating.
THIS IS NOT THE SAME FOR MOST GAS RIFLES.
A gas rifle, (WE series, for instance) firing 400 fps with 0.20g, will have a joule rating of 1.49joules (1.49j is the energy from a 400fps 0.20g object, irrespectable of the gun firing it).
But because the gas system modifies the amount of gas fired dependant on how long the BB is in the barrel, and heavier BB's take longer to travel down the barrel, they then are pushed by more gas!
Loading the same gas gun firing 400fps with 0.20g BBs, with 0.36 BBs, will likely chrony in the area of 350fps with 0.36g BBs. This is a joule rating of 2.05joules. Which is equivalent to 470fps with 0.20g BBs fired from an AEG or a spring gun.
This is dangerous, especially if the operator is not considering a minimum engagement range with his weapon.
Use this site for more info:
http://msed.bbbastard.com/index.php?...d=53&Itemid=57