1. Never exceed the recommended fill pressure of a PCP.
Apart from being extremely dangerous, over-filling does not raise the power of the airgun, but usually reduces it and ruins the accuracy, so there is no point in exceeding the recommended pressure.
2. Never fill a PCP with ANY gas other than breathing air.
No other gas, whether inert or not, is safe to use in a PCP. Fill only with clean, dry, breathing air, either using a stirrup pump, preferably one fitted with a moisture trap, or an air bottle filled at a diving centre. 3. Store your airgun and magazine separately. If possible, also store the magazine unloaded, and separate from pellets.
4. Store your air bottle securely out of reach of young children.
The bottle should be stored where there’s no chance of it being knocked over, and if there are children in the house, preferably under lock and key.
It’s wise to look into the breech to check that the barrel is n’t loaded as a rifle is handed to you