synrod .25 problem

[AK73]

To me it sounds like the bolt had been push in but not push down in the locked position.
When the trigger was pulled the air went in two direction, some out of the barrel but with the resistance on the pellet traveling down the barrel the path of less resistance was towards the bolt. When ever a PCP is fired and the bolt is either not pushed in or not pushed down in the locked closed position the largest amount of air when come out of the breech and the breech O ring will come out. If the bolt had not been pushed in the breech O ring could have come out and hit you or someone near you and caused serious injury. Always wear safety glasses!!
If the bolt had been pushed in and locked in the down position it would never have happened.

IMO there is nothing wrong with the Marauder and all you need is a new breech O ring

I've been there done that not once but several times! Most of the time it was when I was shooting the gun to degas it and pulled the trigger before I got the bolt closed

Norm
Discos R Us

So if while trying to decock my disco I accidently dry fired it with the bolt back it's bad for it?

[starlingassassin]

To me it sounds like the bolt had been push in but not push down in the locked position.
When the trigger was pulled the air went in two direction, some out of the barrel but with the resistance on the pellet traveling down the barrel the path of less resistance was towards the bolt. When ever a PCP is fired and the bolt is either not pushed in or not pushed down in the locked closed position the largest amount of air when come out of the breech and the breech O ring will come out. If the bolt had not been pushed in the breech O ring could have come out and hit you or someone near you and caused serious injury. Always wear safety glasses!!
If the bolt had been pushed in and locked in the down position it would never have happened.

IMO there is nothing wrong with the Marauder and all you need is a new breech O ring

I've been there done that not once but several times! Most of the time it was when I was shooting the gun to degas it and pulled the trigger before I got the bolt closed

Norm
Discos R Us

So if while trying to decock my disco I accidently dry fired it with the bolt back it's bad for it?

ive done the same thing countless times with my mrod

........cock the bolt........load a pellet....forget to close bolt because im an idiot .........pull trigger LOL....POP! LOL

at the most ive blown out the breech oring,i dont believe it has hurt the gun in any way.

[Bryan Heimann]

That is crazy.  Growing up, I was taught to never dry fire anything, period- that it was bad for all guns.  In the service we dry fire all the time to practice trigger control, apparently an M4 can handle it just fine.  Now into airguns- springers you can't dry fire but I never would have though twice about dry firing a pcp or a multipump.  The wisdom of my elders still applies to everything it seems

[AK73]

That is crazy.  Growing up, I was taught to never dry fire anything, period- that it was bad for all guns.  In the service we dry fire all the time to practice trigger control, apparently an M4 can handle it just fine.  Now into airguns- springers you can't dry fire but I never would have though twice about dry firing a pcp or a multipump.  The wisdom of my elders still applies to everything it seems

I was just concerned about dry firing it with the bolt back. I know it doesn't hurt a PCP to dry fire it normally. Why do people think it is so bad to dry fire guns, anyway?

[Bryan Heimann]

In some guns it can break the firing pin

[AK73]

In some guns it can break the firing pin

That's rimfires right?

[FuzzyGrub]

I have two benji pumps with gauges that agree with each other (less than 100psi diff).  I have benjiman gun gauges that are near equal to the pumps or read 100-200psi higher.   As I said, 600psi diff is allot.  I would still guess that most of the error is in the gun gauge.  Even if your gun gauge is correct, you could test in 200psi increments and see if you start to get valve lock.  Also, for a ballpark comparison, you may want to try this: when gun is at 2kpsi, count the number of slow, full length pump strokes to open the check valve (click).  This should be 7-8 strokes.  If it opens sooner, gun gauge was probably reading high.