One valve port Pneuma

[Jay]

 Bro. Darryl if you would like to recover a pellet when fired at really any pressure/speed an have it remain in perfect shape take a Pringels(? you know I can't spell) can or other such tube an stuff it full of plastic bag's tight, I can shoot my gun's from 10yd's away an the pellet will only enter about 3" an is easy to recover in this way for inspection.

[Ribbonstone]

That's getting much better. Evidently there is something happening with that breech, barrel, and the o-rings.  would be good to get some velocity readings with the new o-rings in place.

[darryl]

Oh great, Jay! Now I have to tell the wife how I ate a whole can of Pringles in one sitting: "but Honey, I needed the can to catch pellets!" I'll be catching cast iron skillets, pots and pans! (good idea though )
Rib, I'm trying to work up the nerve to ask the wife if I can buy a chronograph. Everyone's telling me I need one. I know it's true. At least now I'm up to 30 good shots from 180 bar. 

Maybe I can get a really crack shot (Jay?) to give it a good test out to 45-50 yards one day soon.

[Pipewelder]

Darryl,

Some of the exploded views I have downloaded show the oring above and below the transfer port.

[darryl]

Thanks PW, I'll take it down tomorrow and see what things look like. Got a link to those exploded views? Does your barrel have detents for the set screws? Mine does, but some others (older I guess) do not.
am I having fun yet?

[jason 2323]

hey hows it goin new to this forum and l havent read anyone or you sayin anything about just plain old flat surface and roll the barrel l use my lathe myself but a flat surface will do none the less l have the Hatsan AT44 same as the pneuma and just like alot of my hatsans the barrels are never perfect so if its accuracy your seeking LOTHER WALTHER always helps or if you got deep pockets l just got a couple FX smooth twists blanks from AOA and just setting up the lathe to cut them now and from what l've seen these are some kick arse barrels basically smooth with two twists most the way down the barrel but way more defined at the end will post some results later on but LW is a heck of a good barrel and depending on where u r and who u no u could get one for your gun in .177 for as little as $80 hope this helps if you havent already checked it just my 10cents

[Pipewelder]

Heres the link to a drawing.  http://www.umarexusa.com/umarex/images/partsdrawings2/Pneuma.jpg

[darryl]

welcome Jason!
PW I have a drawing that's similar, but I had to print it out and cut away the non-English sections. Yours is easier to follow. thanks!
darryl