Tested my chrono device, it shows a consistent 416fps at 140psi. 10mm steel BB is about 4.5gms/69.4gr.
Muzzle energy = 27ft.lbf/36joules.
I'm changing the PVC chamber/stock for a stainless one, it has less volume but I will feel safer taking it up to higher pressures. Going to do the same chrono test when I get it assembled again.
New stainless chamber. I like the adjustable stock better.
The results are in, new chamber at 140psi = 357fps, 160psi = 385fps
![Razz :P](./images/smilies/icon_razz.png)