I kept a break barrel pellet gun loaded for about 5 days
 

What damage may have happened to the spring in the gun?

It is now completely and totally useless. Box it up and mail it to me, and I will safely dispose of it for you. But that's just the kind of guy I am.:rolleyes:






You could keep it cocked for 5 YEARS with no ill effects.

There is no damage. Enjoy the gun. It doesn't hurt a spring to keep it compressed. I keep my 1911 cocked and locked 24/7 and it still goes bang when I pull the trigger.

That's not what I just learned over at AirgunOne. The springs are overly compressed and it will mess up the gun if you keep it compressed for too long. That's one of the great things about the new Nitro Piston guns, no spring to worry about, only a cylinder of compressed nitrogen.
Do a google on it and you'll learn more about the care and feeding of a Springer.

I would guess it depends on what type of air rifle it was. I use to leave my Gamo cocked for sometimes weeks on end. I don't do it anymore but it still works great and hasn't lost any power. If I were you, don't fret over a few days, however I wouldn't make it a regular practice.

Not saying the gun won't still work but you will lose power over time if you keep it cocked.I use to think it didn't matter but it actual does.
Hit the link for the answer.
http://www.airgunone.com/forums/showthread.php?t=5833

Mine is a Gamo, I think what I'll do is put a round in the chamber but not cock.

Thanks for the advice everyone, I had it loaded but then I learned it can be bad for the spring so I freaked out a bit.

I had a RWS and they advised to never keep the spring compressed tto long. An air gun specialist took a spring gun @1,100 or 1,200 fps and kept it cocked for an extended period of time. It reduced the FPS down to 950 fps or a bit lower.

He said pellets were more accurate @ sub sonic velocity- advised people not to try it at home. See if you can try a chrono it - if it's still up to std and accuracy hasn't suffered - all is well :)