Can I leave the co2 in my gun if it's still full and I'm not using it anymore. Example if I go hunting small pest with my co2 gun. And maybe only take 4 or 5 shots and no more pest to shoot. Can I leave the co2 in or do I need to release all the co2 out before I store it away. Can I leave the co2 in for weeks? Months? A year? I have pcp guns and I always leave them full for weeks and months without shooting and it's fine. I wonder can the same be for co2 guns.