Hopefully I'll be using a cothran valve, if not a maxflow disco valve.
Ok a little update here. I'm planning on staying with .22 so I bought the maxflow disco valve, I also have a bought a non roll stamped 2300t tube. This is my first time messing with HPA so I'm a dark side newb. I've done my research but still have some safety questions. This is going to be a hunting gun, not a plinker so power is the factor here. My goal is 1000 fps with predators.I'm going to use a 22ci tank, regulator and tank block from jds airman. It will be a 3000 psi tank and I've decided I want to regulate the output at 2600 psi, should I drop it to 2400? I'd like to get 5-10 full power shots. The valve and tank block will both be pinned with quality 10-32 screws. I will put a third one in the tank block if needed. Will this combo be safe to 3000psi in case of regulator failure? One more question, I plan on using both of the front breech screw locations to mount the steel breech to the tube. It seems to me this will be the weak point in the build. Do I need to worry about the breech blowing off at this kind of pressure?Thanks for the time, Ricky.Edit: just called JDS, looks like I'm going to have to wait on a tank block...he's looking for a new machinist to make the tank blocks. Is there room on the QB tank block to move the screws downward away from the end of the tube? If so, is there any reason it would not be safe to run the qb block at 3000/2600 regulated?
I'm new to this but pretty sure you can view the full size photo in my profile.
Quote from: stilkikin on July 20, 2016, 09:04:45 AMOk a little update here. I'm planning on staying with .22 so I bought the maxflow disco valve, I also have a bought a non roll stamped 2300t tube. This is my first time messing with HPA so I'm a dark side newb. I've done my research but still have some safety questions. This is going to be a hunting gun, not a plinker so power is the factor here. My goal is 1000 fps with predators.I'm going to use a 22ci tank, regulator and tank block from jds airman. It will be a 3000 psi tank and I've decided I want to regulate the output at 2600 psi, should I drop it to 2400? I'd like to get 5-10 full power shots. The valve and tank block will both be pinned with quality 10-32 screws. I will put a third one in the tank block if needed. Will this combo be safe to 3000psi in case of regulator failure? One more question, I plan on using both of the front breech screw locations to mount the steel breech to the tube. It seems to me this will be the weak point in the build. Do I need to worry about the breech blowing off at this kind of pressure?Thanks for the time, Ricky.Edit: just called JDS, looks like I'm going to have to wait on a tank block...he's looking for a new machinist to make the tank blocks. Is there room on the QB tank block to move the screws downward away from the end of the tube? If so, is there any reason it would not be safe to run the qb block at 3000/2600 regulated?First off, pellets are rarely accurate above 900-950 fps. Second, Predators are more than likely not the most accurate pellet in your gun. Use the most accurate pellet.You don't need to regulate the tank to anything above 1500 psi to get as much power as you could need in .22.5-10 shots out of a 22ci tank would be the crappiest efficiency that I've ever heard of. With a 1500 psi setpoint, you should expect well over 75 shots with a 22ci bottle.Along those lines, 22ci bottle is too big. No reason to go up from the 13ci bottles.Using high strength screws on the valve is what's required to make the tube safe for 3000 psi. Can't speak about how to make the tank block take 3000 psi.You said you've done your research into going to HPA, but you might want to do more.[/quotNothing wrong with a larger bottle. Why is more shots without refilling bad?