So far I have a precision 10mm hydraulic tube for a barrel, 10mm BP roundballs as standard ammo..
I used some more seamless tube, 25mm I.D as the main reservoir and the CBHV, wich I have given a tune-up..
The first two testshots I thought something was wrong.
The first one, at just 30 bar shot a hole through my leather welding glove...casually hung over the muzzle.
Usually this catches and stops the projectile..
Hmm.must have been a worn spot?
Second shot I decided to use a capped off section of pipe to catch the projectile.
I haven't been able to relocate the pipe....
Third testfire was done inside of a forktube wich I had braced against the brick wall...
It completely pancaked the lead roundball.....
Looks exactly like those seen in high speed footage of 9mm handgun ammo hitting a steel object...HMM..
All I did was tap the strikerpin with the handle of a small file...
No effort at all.
Definately some potential!!
On all testshots the bolt/slide blew back completely...I was worried blowback would hurt performance...seems it works exactly like it should.
The striker runs through a piston to hit the valvestem.
The valve allows some pressure to exit past the valvestem to drive the coilspring backed piston back and load the next shot.
Clearly not yet finished....
I'll have to tinker with it once a semi/full auto hammer/sear/trigger is added as it will most likely respond a bit differently.
I can add a rubber washer as a one-way valve to give the blowback piston more power if needed and boost up springforce if autoloading isn't smooth enough.
The bolt comes from a powdercatridge nailgun..wich I could not use anyway for legal reasons.So I stripped it for parts to use in a pneumatic.
It's such an exact fit !!
The breech is 100%airtight yet the bolt cycles smoothly...without an O-ring seal! :bounce:
