QB78 bulk fill

[Korak-again]

   The Paintball shop nears my son's place has 1000psi nitrogen refills. Has anyone tried nitrogen in a QB?

[Gertrude]

Although I have not tried straight Nitrogen in my QB,... It will work just fine.

 Earth's atmosphere (air) is roughly 78% nitrogen already.
100% nitrogen is even **better** for a PCP/Co2 gun, because it is completely dry and contains no moisture.

[Doug Wall]

You'll get about 3 shots per fill. With liquid CO2, you get 24 grams of gas. With Nitrogen gas, you get a fraction of a gram.

[Korak-again]

You'll get about 3 shots per fill. With liquid CO2, you get 24 grams of gas. With Nitrogen gas, you get a fraction of a gram.

   If that is the case, why would paintballers use it?

[Ribbonstone]

Really can't think of any reason they'd offer 1000psi fills, unless they were just willing to do it for you.

Paintballers have no real use for 1000psi nirtogen (or air) fills, their air tanks are either filled to 3000psi or 4500psi...it's the regulator on the tank that supplies the low pressure that the paintball gun runs on. Also, paintball rules limit paintball speeds to under 300fps, so they can get away with running their regulators to lower pressure than we often use (some run as low as 450psi output pressure in order to say under that 300fps limit).

If they don't run on that, then they run on co2, wich kind of self regulates.  CO2 actually sold by WEIGHT not pressure (which is why it's like 12grams, 88grams, 9 ounces, etc).  its basically a liquid, and as you shoot some of the gas pressure it supplies, some of the liquid becomes gas to replace the gas you used...which goes on and on until you run out of liquid co2 to convert to gas.

So...I honestly have no clue why they offer a 1K fill of Nitrogen, it's not a useful fill for anything I can think of.  Even for a paintballer running a very low pressure tank (lets sazy 450psi output from the regulator), that's not going to be a whole lot of shots compared to the 3k or 4.5K fill his tank can handle..


For what it's worth, have pressurized a QB tube (using just the bulk fill valve) to 1100psi and managed 8 shots.  BUT they were mostly pretty "sucky" shots.  Of the 8 shots, only 3 were really clustered in something like a "group".

Why? Was about 180fps shift in velocity over those 8 shots.  Which even at 25 yards, was a whole lot of vertical stringing. 

Using old/wet/moldy sheet rock as a target:




Started low (the closing pressure of the gas pressure stronger than the opening pressure of the striker's hit to the valve stem), climbed for a couple of shots, clustered for 3 shots, then shot back down to the very bottom pellet strike.

Being a guy that likes to find out for himself, I recognize that quaility in others, so I suggest you take him up on the 1K fill offer, set up a traget at some moderate range (lets say aything from 15-25 yards), and shoot 10 or 12 shots.

[Doug Wall]

You'll get about 3 shots per fill. With liquid CO2, you get 24 grams of gas. With Nitrogen gas, you get a fraction of a gram.

   If that is the case, why would paintballers use it?

Compare the usable size of the tube  (the part that holds the 2 12 grams) to the size of the tanks that the paintball guns have. Then multiply that bigger tank by 3 or 4.5 (1K psi compared to 3 or 4.5 K psi), and you see a huge difference in the amount of gas available.
I think that Ribbonstone summed it up nicely.

[Korak-again]

   I stated It wrong. It is a 3K bottle.

Thanks

[Ribbonstone]

Do find with non-face-to-face form of communication, being "Capt. Obvious" sometimes pays off.  SOOOOoooo...even though you likely already know...please do not put 3K of air into a QB tube.

If you've an HPA bottle, Nitrogen will work...after all, most of air is nitrogen.