What kind of shot count can I expect per fill?

That depends on your S510 model, calibre, and whether it’s regulated or not.

• Standard unregulated models (sub-12 ft/lb)
  • .177 calibre: around 70–90 shots per fill
  • .22 calibre: around 60–80 shots per fill
  
  
• Regulated models (XS or XS Extra)
  • .177 calibre: up to 100 shots per fill
  • .22 calibre: up to 90 shots per fill
  
  
• FAC-rated high-power models
  • .177 calibre: around 40–60 shots per fill
  • .22 calibre: around 35–50 shots per fill
  • .25 calibre: around 30–40 shots per fill
  
  

These figures can vary slightly depending on pellet type, temperature, and how you shoot, but they give you a solid idea of what to expect.