HPA tank shots per fill
Will your bottle last the whole game? Estimate shots per fill for your tank, regulator and barrel.
Your setup
Estimate
Shots per fill
1,544
Likely range: 1,235 – 1,852
- Full magazines
- 12
- Usable air
- 149 L
- Air per shot
- 96.8 mL
This is a rough estimate: temperature, engine tuning and leaks change the result a lot. To know exactly, count shots on a real fill.
See HPA alignment kitsHow it works
Usable air is what the bottle holds between the fill pressure and the output pressure. Each shot uses, roughly, the barrel volume at output pressure times the engine consumption (dwell, chamber volume and leaks).
A 48ci bottle at 200 bar, 110 psi output and a 363 mm barrel gives about 1,600 shots, in line with what players see. Lowering the output pressure or shortening the dwell stretches it.
This is a rough estimate: temperature, engine tuning and leaks change the result a lot. To know exactly, count shots on a real fill.
Frequently asked questions
How many shots does a 48ci tank give?
Filled to about 200 bar (3000 psi) at 100-120 psi output, between 1,300 and 2,000 shots depending on the engine and barrel. At 300 bar (4500 psi), roughly 50 % more.
Does output pressure affect shots per fill?
A lot: each shot uses more air the higher the pressure. Setting the regulator just high enough for your FPS target is the easiest way to gain shots.
What is engine consumption?
It depends on the dwell (how long the valve opens), the chamber volume and any leaks. A well-tuned engine uses less; a long dwell or a leaking seal can double the consumption.
Bar or psi?
Bottles are usually rated in psi (3000 or 4500) and filling stations in bar (200 or 300). 1 bar is 14.5 psi.