[The Chrome Avenger]

I have a complete laylax tuned TM vsr10 Gspec and here is what I have found out from my own experiences.
My G spec chronos at about 495fps to 500fps with hop set to about 1/4 using a .2g BB. Now if I chrono the gun with MADBULL ultimate heavy .36g it will chrono at about 425 to 430 fps. Now this means that my rifle produces about 3.06 joules of energy using the .36g BB, and if you work the figures out then my rifle should chrono about 560 fps with a .2g BB. I beleive that the lighter BB the .2g is out of the barrel before it uses the full acceleration of the piston and all the air, hence a lot of energy is wasted. Through using the heavier bb it is using more of the air from the piston and cylinder and is more efficient.
I have just purchased a new TB barrel 430mm and I am going to fit this to see what results I get using the exact same set up with a longer barrel, as i am very interest to see which set up is better.
As people have stated optimuim barrel length is do to do with cylinder air volume and barrel air volume.
(pi x radius squared x length) will give the volume of a cylinder and a barrel.
Then you need to work out the correct ratio.
Note tight barrels give more fps but may not be more accurate over distance and my advice would be don't worry about fps worry about consistant shots, a well set hop up will do wonders.

My current rifle set up is
Laylax zero trigger and piston.
laylax teflon cylinder.
Laylax Ball bearing spring guide.
Laylax 170 spring (clipped)
Laylax 303mm barrel. soon to be swapped for the 430mm.
Firefly Hard hop up rubber.
Dangerwerx hop up arm.
PDI receiver and outer barrel.

Hope this kind of helps.

 

[The Chrome Avenger]

Couldn't agree more silent scope, this is why I only use heavy ammo, lightweight ammo is a no no in my opinion in a heavily tuned vsr, the better results come from the heavy ammo. The heavy ammo carries a larger amount of kinetic energy and in doing so they hit harder, and are obviously less affected by wind etc.