I've gotten quite a bit further on this build. I wish I knew how to post a short video clip without doing a YouTube video.
I have it set up in my vise for test firing. The tank is rated for 4500psi and the regulator is at 3000. I discovered that plenum volume is very important in this ordeal. I only have about 3.5 cubic inches of plenum volume that pushed a 250 grain slug at 665fps at 2500psi. Meh.
So today I took out the regulator and made an adapter, making the tank, plenum and valve all one big plenum volume, about 32 cubic inches and set it back up, pumped up to only 2500 psi and pushed a 388 grain slug at 725fps! Much better but still not good enough.
I have a different idea to gain quite a bit more velocity and I'm gonna give it a try, maybe tomorrow. I'm hoping to push the 250 grainers at 1100 or more when it's all said and done.
