CP2 gets a big upgrade.

[avator]

Over the last year or so I have changed my approach. I take what a gun will give me and try to fine tune it. If I need more power, I buy a more powerful gun. Guns have parameters. You have a Bandit but want more, buy a PRod. Have a Prod but need more, buy a Leshiy. All these guns are great fun, accurate and reliable guns if you stay within what the platform will give you. When you go outside the parameter, they get whacky, temperamental and inefficient. I will get off my stump now.

I have stated time and time again on this forum.
If the gun I am holding at any given time is not up to the task at hand I will simply go in the house and get one that is.

[Pelletjunkie]

Like Dallas mentioned, the hammer might need to visit Weight Watchers. You can feel how heavy it is in all the guns, CO2 or HPA. It’s actually disruptive to the shot cycle. But one step at a time. Glad you’re a patient man Bill. I have been guilty of making two changes at a time and being unsure of which one was beneficial.

[avator]

I used to build custom PCs back in the day...
It was the same deal.... bigger and faster. We even water cooled them...
What? Water in a computer? Is you CRAZY?
I knew a guy that built a clear computer case... he literally had live fish fish swimming in it.

[Pelletjunkie]

That’s funny. But I believe it.

[Pelletjunkie]

Before shipping the TP off and while my CO2 pistol was apart, I figured I would try it. With the smaller TP the gun is almost 20fps faster and has a smaller ES. What we all have to take into consideration is who built the gun. SPA. Not the sharpest tools in the shed within the airgun industry. Like I’ve said before, put a big TP in it, show a high advertised speed and guys will buy it. Now my CO2 gun is not operating at 3,000psi. Let’s see how Bills gun does with more realistic unregulated porting. If I ever decide to start shooting my 2 CP1’s again, they are both getting smaller TP’s.

[Long_Gun_Dallas]

It seems if you squeeze the air charge a bit before entering the barrel, you can increase velocity.  That's just fluid dynamics at work.  If the charge is inadequate for the port size, it will move lazily.  My FX gun dumps into a .30 bore before being squeezed back down to .22 again.  Pretty sizeable increase in speed there....  AND if you can smooth the transition, you get bonus points.

[avator]

Sorry guys.... got involved in some Betty Lou stuff.... food to be exact...

Thanks again... we'll revisit it when the port arrives.
Now we're into areas that I know nothing about... 

[avator]

Received the new TP from Frank (TY kind Sir).
I don't know what I was thinking last Sunday... I gassed the gun up at the end of the shooting session all the while knowing I wasn't going to shoot it again until I put the TP in.... 
My next dumb move was to start breaking the gun down without remembering I did fill it.
The high pressure in the tube had the TP 'locked' into the gun so, I had to put the receiver back on and dry fire the pressure off by pulling the bolt back and releasing it several times... like a lot of several times... to the point I wore a blister on my index finger.
Why didn't I just put the trigger back in? Because if I did, I wouldn't have had the experience of my third idiot move.... 
Got the gun all back together and went off to lick my wounds.
Hopefully Saturday or Sunday, depending on work schedule, we'll get to fill it up and do some more testing.

[avator]

Oh Hey !!! I just remembered why I filled the gun last Sunday..
I wanted to check for slow leaks.
Trust me, there were no leaks... It was totally full... lol
I did however find the two barrel orings damaged again... good thing I ordered 47,002 of them... 

[avator]

Had a few minutes before work this morning so I trodded off to the gun room. I used a section of foam pipe insulation as a cheek riser and stretched an elastic shotgun stock cover over it. The void in the stock is a perfect place to store my 6 mags. The shotgun shell holders on the passenger side of the cover provide places to store plastic vials of various pellets. And the coolest thing is... when you remove the stock to convert it to a pistol you will see a hole in the grip to store a C02 cart... this is a perfect place to store the fill probe.
A padded backpack can carry gun (broken down) and 30min scba tank.
The swivel stock screw makes for a great single point shoulder strap.
All this makes it a very versatile RV/Camp/ATV gun.

[avator]

Let's just start out with...
It's cold and damp out here !!
I'm under the roof of the deck and I got some hot coffee so I guess I'm good.

[avator]

Pressing on...
As reported, I got the custom TP from Frank... Thank you Sir.
Topped the gun off and ran a few 7.9 CPHP 7.9 over the chrono.
I did nothing more than install the TP....

[avator]

Refilled the gun and switched to the 8.44 JSB domes...

[avator]

Frank..
I have a couple spare valve body back halves. Think I'm gonna steal your inner tube buffer idea on one of them.
Besides, that will give me time to warm up a bit..... lol

BBS.

[Pelletjunkie]

Poop! I should have made that TP smaller. My bad.

[avator]

It's all good.. I kinda like where we are.

[avator]

BTW.. those two spare valve bodies I have are wrong. The valve retainer holes and the stock screw holes are reversed. That's ok too because my glue wasn't gonna hold the rubber on... 

[avator]

Good news is.. I had the gun stripped down and the valve out twice and I still have no leaks... lol
That's a first for me.

[Back_Roads]

 Been following this thread while tinkering on my own also. I did the pp 800 .25 cal. to Diana chaser stock/grip switch, and was thinking of uses for the spare CO2 slot, and bingo Bill figured it out for me, yes nice place to stash a fill probe 

[Pelletjunkie]

Sending you another TP with a slight twist on the design. Let’s see what effects it has and go from there. I think that once we find the TP size that shows promise, then it might be time to look at the valve. At least with having some extra TP’s, you have some more tuning tools.