Lets try this again... Dispatch gun

[BigBird]

Sounds good and well thought out.  So with the rethread of the end, I've wondered about the processs.  Did you ream the .774-.780 and then tap or can you ream as is?  I put off getteing a tap for that because I thought I'd mess it up and create a missle.

[YEMX]

For something like a reservoir end cap or pretty much anything to do with pressure vessels, I feel that single point threading on the lathe is the only way to go.  That's my opinion.  I'm sure tapping is fine, it's simply personal preference that I prefer single point threading.  Having said that, I sent my tube off to be shortened and re-threaded.  My lathe skills are not great.  Someday, but not in time to do this project. 

As far as the process, perhaps Luge007 will chime in, as he was the one that did the fantastic cut and re-thread!

[YEMX]

All the new o-rings are on order, as are the valve screws.  I decided to go ahead and get a Disco bolt- why not, right?  I'm already ordering parts and I'm using a Disco breech...  *shrug*.  I'm still waiting on those small grinding balls for my Dremel so I can see about grinding that edge (burr) down some.  That's going to be slow going- I DO NOT want to mess up at this point.  I'm nearly done! 

I've found a LDC Rocker1 made for me.  I screwed in the grub screws a touch, so they're below the surface of the CF and filled in the depressions with JB Weld.  I then sanded the areas that I filled down smooth.  I gave everything a light sanding for some tooth, and painted everything a uniform color.  Then cleared it.  I didn't particularly like the CF look.  It should be enough to tame the 14 fpe goal of this pistol.  It's also quite compact, which is nice.  If it's not enough, I'm sure it'll migrate so some other project down the road. 

[YEMX]

Not a very good picture, but here's a shot of the filled and painted Rocker1 LDC:

[YEMX]

Ooohhh, shucky duck!  I actually got those ball grinders for my Dremel 2 days ago!  I didn't check the envelope well enough.  Anyhoo, I proceeded to grind down the burr inside the tube...  It took me a while- about half an hour (maybe more) to get it down to a point where the gauge block and the valve go into the tube.  Yes, these are the old and kinda knackered o-rings- but still good enough to act as stand-in's.  Oooh yeah!  I'm still waiting on the new o-rings to come in from Crosman, but when they do- this gun is finally going together!  Aww yiss!!

[YEMX]

I have the tube all assembled, having some issues with it being really hard to cock.  I'm working through it.  Main tube is holding air though, so there's that.  I'm going to polish the hammer and lube it up- I've clipped some coils off the hammer spring, as I have a power adjuster.  I'm hoping the polish and lube will work.  Also, I think something is amiss with the Prod trigger group- it's not working like it should.  I'm going to take a look at that too.  Overall though, it's looking pretty dang good!  Not gonna lie, it's smaller than I thought.  Once it's all together, it's not as ungainly as I thought it would be.  I like it!

[YEMX]

I seem to have misplaced my barrel band    The one I had in the box is for a .5" O.D. barrel...  I'll look for the correct barrel band tomorrow- it's around here somewhere.  It's amazing what a little polishing and some moly lube can do for a hammer!  She's like butter now.  The trigger also had a spring out of wack, so it's all good now.  I put a tiny bit of moly on the contact points in the trigger too, for good measure.







Still have to put on the barrel band, and epoxy the LDC mount.  But other than that, she's done.  I'll run some numbers soon. 

[mackeral5]

I like that, a lol......   that is what I envisioned before you went off and built another airforce gun, lol...

[YEMX]

I like that, a lol......   that is what I envisioned before you went off and built another airforce gun, lol...

One day I WILL build this exact gun, but either as a .30 or .357.  THAT would be an awesome pistol!!

[YEMX]

NOW it's done-done.  I'll get to "tuning" soon!

[Back_Roads]

 Now that looks just like you imagined 
Hmm I have a faster twist .308 barrel that I was in the process of putting on a Crosman 1400, but may change my mind and cut it in 1/2, want 1/2  

[YEMX]

How were you going to machine the barrel?  I have a similar (kinda) idea for a .25 pump gun (think "Millennial Pump" build): 7/8 tube, Gen 1 Mrod trigger, "Last Lever" from Mac 1, Custom made pump valve  w/a plenum, 1 piece .25 barrel, like what's on a 1400... 

I'll get some numbers for this gun today!

[YEMX]

I did 3 5-shot strings today, all were about the same.  Not too much variance up or down between them.

2k psi fill, 18.1 JSB pellets
715 fps    20.5 fpe
698         19.5
692         19.2
675         18.3
662         17.6 (end @ 1.5k psi)

I could tune it down a touch for more shots closer to that 14 fpe mark, but you know what?  It's a dispatch gun anyway.  I'm fine with this.  Plus, going from 1.5k psi up to 2k psi, my DIY mini filler tank will net me a lot of fills.  No biggie.  I'm going to call this project DONE!!!!

The Rocker1 LDC did quiet this gun down nicely, but the much MUCH larger Neil Clague LDC designed for 50 fpe .25 worked significantly better- so I'll use the NC for around the house.  The Rocker1 will be fine out in the woods/field.  The only bad part about this build is that with the larger LDC, I have to remove it to fill the gun. 

[Back_Roads]

I did 3 5-shot strings today, all were about the same.  Not too much variance up or down between them.

2k psi fill, 18.1 JSB pellets
715 fps    20.5 fpe
698         19.5
692         19.2
675         18.3
662         17.6 (end @ 1.5k psi)

I could tune it down a touch for more shots closer to that 14 fpe mark, but you know what?  It's a dispatch gun anyway.  I'm fine with this.  Plus, going from 1.5k psi up to 2k psi, my DIY mini filler tank will net me a lot of fills.  No biggie.  I'm going to call this project DONE!!!!

The Rocker1 LDC did quiet this gun down nicely, but the much MUCH larger Neil Clague LDC designed for 50 fpe .25 worked significantly better- so I'll use the NC for around the house.  The Rocker1 will be fine out in the woods/field.  The only bad part about this build is that with the larger LDC, I have to remove it to fill the gun. 

Right on dispatch, if they aint all down by then something needs to be addressed
LOL
 Oh on the .30ish barrel I do have a friend with a professional machine shop that I visit to get tweeks done to the perfection that a dremel and drill press can not do, or are you refering to the tech details that have not crossed my mind as of yet ?

[YEMX]

I was just wondering how you were going to machine the chamber and such- the slots and TP are pretty straight forward, but the idea of machining the chamber weirding me out for some reason...