I would not worry about it at all. GAMO tests examples of their new guns for dry firing before they hit the market. According to GAMO,2 production samples are each subjected to 50,000 dry fires...I had to read that more than once,too...and no failures. No other airgun mfr that I know of does that.
It is better not to do that.
The possibilities range from absolutely no problem to shattering the spring, destroying the piston seal, destroying the breech seal, or damaging some internal mechanical parts.
I've done it with my CFX, which is the same breech design. That spring didn't break until about 4500 rounds, so it probably wasn't my fault. I've also managed to fire it empty--sometimes the pellet slid out of the back of the barrel and onto the loading ramp just as I rolled it shut...that is technically more dangerous, but supposedly Gamo designed for it.I would agree with your analysis. With the breech open, the piston is just thumping some air that can't go anywhere, thus no chance of hitting the wall, so to speak.
Quote from: 1959 Moggy on October 11, 2017, 11:12:05 AM I would not worry about it at all. GAMO tests examples of their new guns for dry firing before they hit the market. According to GAMO,2 production samples are each subjected to 50,000 dry fires...I had to read that more than once,too...and no failures. No other airgun mfr that I know of does that.I had heard that too but never knew if it was true or not. If true, I'm glad to hear that because I own a Swarm and was not happy with the number of dry fires on JSBs given you have to be much more mindful to check if the pellet has seated or slid through the barrel on the auto feeding mechanism before the barrel is closed.
I accidentally dry fired my Accu with a closed breech when I first got it. No damage but I saw a photo on the net somewhere (?) of a CFX breech damaged from a few dry fires. The "damage" was an inprinted ring matching the outside diameter of the barrel at the face of the receiver. I would venture that a worn or compressed breech o'ring may cause the same type of damage over time.