Unable to reach 300 bar on new gun

[jdh2550]

I have a new gun that is rated to hold 300 bar and holds 290 cc. My SCBA (88 or 98 scf - cant tell sticker has a scratch) tank is sitting at 4000 PSI . I tried to fill the gun to 300 bar but can only reach 250 until it reaches what appears to be a state of equilibrium between the gun and the tank. Is this right or am I doing something wrong?

Pics were taken at what I think is equilibrium (no more air entering gun from the SCBA tank).

 

[GENESIS]

300 bar is equal to 4350psi... so you need a 4500 psi CF tank to fill your gun close to 300bar

 

[bubblerboy64]

I personally would not fill the gun much over 250 . The tank to about 300 I think it’s a lot easier on the equipment . Yes I know you have to fill more often 

 

[douger]

no need to fill to 300 

 

[jdh2550]

Ok. So then my gauges are correct. My tank can be filled to 4500 but is currently sitting at 4000. The shop always gets it close to 4500 but when i get it home its dropped a little. Guess I will have to make sure they fill my scba tank and then let it cool and top it off again after the pressure drops from cooling. Thanks for the quick response I was worried something wasnt right

 

[jdh2550]

If I went to 300 I guess I am just getting a few extra shots. Since it's a regulated gun I will drop of the reg at the same pressure every time, only difference would be how many shots til I drop off right?

 

[Bigragu]

What gun is that, if I may ask?

 

[jdh2550]

Great point on it being hard on the equipment. I'll take the advice and just fill more often instead of going to the max.

A year after getting into PCP's and you all are still teaching me new things all the time. Thanks for your patience! 

 

[jdh2550]

It's the Zbroia Kozak FC 550 in .22. It has a much more finished quality feel than my Gauntlet does. Will never get rid of the Gauntlet. Just wanted to try something else. Hopefully the scope rings arrive tomorrow so I can brave the cold in central Pa and get to the range before the rain comes this weekend.

 

[Eaglebeak]

Your tank and fill whip gauges are 1000 PSI apart and the gun gauge is in between. Two or all of them are wildly out of kilter. If you want to know which one is correct, you will need to compare them with one that is verified to be accurate. I agree with all of the above, you don't need to fill to the max each time. Even if you manage to get a full 4500 PSI fill from your dive shop, you might only get a couple of full top-offs before the tank drops to under 300 BAR. I doubt that you will lose too many shots from not filling over 250BAR anyway. 

 

[Therealld]

Zbroia ,

Hay, is that a company Biden's son was a officer of?

 

[ohio_hunter]

Zbroia ,

Hay, is that a company Biden's son was a officer of?

how does this relate to fill pressure or air guns?

 

[Keyman62421]

 

[lenweber2]

Your gauges seem correct 4000 psi rivals 275 bar. Appears you are getting full charge with your tank. You need more psi in the tank to go to 300 bar and at 4500 psi in the tank one full fill maybe all you get.