One thing to keep in mind though is that a jacketed bullet needs quite a bit of force to be pushed through the rifling. If you look at the rear of the weights I'm using, they are hollowed out slightly. Which will allow the air to expand the pellet to catch said rifling. Besides, a .40" ID would be ...

Fire extinguisher ;) Also, bullet shaped fishing weights from an unrifled barrel aren't going to be very accurate beyond point blank range. Lovely. I have several c02 tanks I can use. Also, regarding rifling, can I make my on rifled barrel? If not, I might just order an actual .357 barrel blank fro...

Aside from these tanks, what would be a good refillable reservoir for my gun? I don't wan to regulate, so one shot tanks are what I'm looking for. Since the projectile is so heavy, I'll need more pressure than 200psi. Any suggestions? :lol: Also, I changed the caliber from 7mm to 9mm. I'm using stee...

Despite all the helpful info I dragged out of you guys, I made a single shot instead. The method revolves around the guts of a pressure washer gun, using a single propane can per shot. All I need to know now is, how much pressure can a propane can hold? Not the tanks, the really small ones.

Let me know when you guys find something out. I'm as lost as a black rapper in Alaska, what with all you guys are talking about.

Are you going to build a blow-forward bolt for semi-automatic operation, or do something like poland_spud's Mk. III with a single acting pneumatic cylinder? I want a bolt action rifle, capable of shooting more than one shot preferably. Just to make things a bit easier considering this is only my se...

Doctor, just to clear things up a bit, since the thread is kind of hard for me to understand, do you want a quick exhaust valve rifle, or a hammer valve rifle? A QEV, preferably. Thank you for asking. As for the rest, what did you guys land on? Did you agree on anything that would be a best option?

If you're in the US, note my comments about BSP and NPT threads.

YES. If you are in the US, buy the QEV that I showed you in my previous post.

It's only 1/4". Is that even going to work? I would think it's going to bottleneck.

Ok, I guess I have nothing to lose. I'll order said QEV, test it, and get back to you.

Yeah. Already found it, just too bored to edit my post. Thanks. And I didn't plan on trying it, because I knew something is wrong. My forehead hurts from all the slapping.

So I suppose I'll make it semi. Seems legit. I'll be back, soon.

Thank you. Is there a link I can follow to JSR's build? Also, I tried to build a QEV myself but I don't think i made it correctly.

Here is the basic design of what I threw together.

So, a couple months ago I joined this forum to express an idea I had. I made one thread before, I want to make another to gather some more legitimate plans. I want to assemble a 7mm PCP airgun. I have the rifled barrel, lead ammunition, and all the tubing you could ever imagine. I need ideas on how ...

Holy Jenova, that's quite the war hammer you've got there. When do you plan on acquiring thy materials?

Ok, so here's the picture. http://img521.imageshack.us/img521/5537/unledzm.png EDIT!!!: Scratch all that junk. I broke the bolt. Back to square one. I think I'm going to use the mkIII design, if I can make the QEV correctly. The mag well is going to be on the left side, hanging off of the receiver. ...

Regarding the regulator, can you send me a link or a diagram to show me what I'm looking for? Thanks.