Crosman 13xx bottle gun

[Tack Driver 10]

I really like these little bottle projects.

Right, I can't believe I kept this bottled up inside me for so long....LOL
It feels so good to just.....get it out.

Took the 13xx 90 gram gun apart and replaced the valve front half.
Aluminum version that got FT and bored 3/8" through (crappy picture).
The valve is the Min Max Smoke Pro valve so kept the back half for continuity.
It has a 3/16" throat drilled close to the TP and a small Delrin valve stem head.
Should be able to chrony it tomorrow, it's freezing rain today.
Expecting a good bump in power.

[Nvreloader]

Ron

Great build/info so far, looks outstanding, I have been following along,
I like the looks of that spring setup on the valve stem...........

Tia,
Don

[Rob M]

Ron what sie e clip or c clip is retaining that stem spring ?

[Tack Driver 10]

Ron what sie e clip or c clip is retaining that stem spring ?

Rob,
They're 1/8" C clips sourced at ACE hardware for about 25 cents each.
You can also get them in bulk at McMaster.
https://www.mcmaster.com/c-clips/

[Tack Driver 10]

Pumped the gun to 2000 psi and ran it over the chrony.
18" Crosman 22 cal barrel.

14.3 CPHP
944 FPS 28.29 FPE
910 FPS 26.30 FPE
906 FPS 26.05 FPE

25.4 JSB Monster
766 FPS 33.10 FPE

33.9 JSB Beast
659 FPS 32.73 FPE

Was expecting more power but not this much more....Yikes!
Wastes a good amount of air at about 50 psi per shot.
Sound test 92.2 dB.

Put a 24" barrel on the gun

14.3 CPHP
980 FPS 30.50 FPE

25.4 JSB Monster
757 FPS 32.31 FPE

What do the experts have to say?

[Rob M]

i noticed the monsters lost a bit of steam on the 24 inch barrel , meaning you could  push more air and still make gains with the 24 

[Tack Driver 10]

I noticed that also.
Possibly the smallish .187" throat is holding it back???
The slot in the tube limits the size of the plenum, more plenum, more power.

Now picture this, a 22 cal 760 PCP pushing 30 FPE.
Same config as this gun .
I'm on it like vomit....LOL

[Blutroop]

Did you try the 33.99 beast with the 24”?

You really got me rethinking a small lightweight carbine..

[Tack Driver 10]

Did you try the 33.99 beast with the 24”?

You really got me rethinking a small lightweight carbine..

I didn't try the beasts in the 24" barrel.
Figured the monsters were struggling so no need to try them.
I have a difficult time handling rejection...LOL

[Tack Driver 10]

I'm deeply saddened to announce that I'll be putting this gun on the back burner (for now).
I want to focus exclusively on the 22 cal 760 bottle gun.
Should get most of it done by the end of the week.
Will be starting a new topic for it soon.
See ya there!

[Killercrow]

Aww man, I was enjoying this one.
The bottle adapters look good!

[Cajun72]

Very nice drop blocks

[Tack Driver 10]

Aww man, I was enjoying this one.
The bottle adapters look good!

Good news, the 760 bottle gun will incorporate a DB also.
One more thing: