Do You Dry Fire Your Gamo Urban?

[Lightyear68]

I'm ready to decrease the trigger pull on my Urban with the longer screw and watched this video from Airgun Depot which looks like the tech is dry firing. The forums are all over the place with whether it's OK to dry fire, with the some saying PCPs are OK to dry fire above 60 bar to avoid damage from bottoming out the air cylinder components. Some even say Gamo says it's OK to dry fire, but I haven't seen anything online from GAMO, and the manual doesn't cover dry firing.

I could just load pellets and aim in a safe direction and fire to adjust the trigger, but I'd like to know the facts on my gun.

Trigger adjustment will probably be the only time I dry fire.

And for those who have added the longer screw for the trigger adjustment, does firing cause rotation to where that screw needs thread lock?

 

[wildcj5]

As long as a pcp has air you are fine to dry fire. Do not dryfire a pcp with no air in it. With really low or zero pressure behind the valve the hammer will smack the valve and either break something or over travel the valve.

Now saying the above I have had guns that didn’t have a way to degas and had to keep dryfiring to empty the cylinder. In this case I did back the hammer spring off so it was not pounding the valve.

On the trigger screw a small dab of lock tight or my preferred is clear nail polish.

 

[jdanvers]

As long as a pcp has air you are fine to dry fire. Do not dryfire a pcp with no air in it. With really low or zero pressure behind the valve the hammer will smack the valve and either break something or over travel the valve.

This is why I like these forums. ^^ Good tip. The way I tend to set my guns up I'm not generally cranking on the HS adjustment anyway BUT I have dry fired my PCP's several times in the past when working on / modding / fixing them. I'll keep this in mind for future - be sure to back the HS all the way out to make it is as light as possible. ( now that I'm thinking about it . . . . dinking with trigger adjustments - yeah - thats where, I think, I've often dry fired a lot - looking for ~that~ clean break )

 

[Ezana4CE]

@Lightyear68 This may be worth reading although not Gamo specific.

What about dry-firing? | Pyramyd Air Gun Blog

B.B. blog post titled What about dry-firing? explores new information, history, tips and tricks at Pyramyd Air.

www.pyramydair.com

 

[starlingassn]

i usually set all my triggers by holding the bolt like you would do when decocking.

cock it,
and just keep your hand on the open bolt without pulling back on it so it can break like you are actually firing,
you can feel it break and if its to your liking or not.

test-adjust-test-adjust....done lol

 

[Vetmx]

I usually adjust triggers while tuning over the chronograph. Kills two birds with one stone. I can try to get a trigger close by doing the holding the bolt or cocking lever method. But when crosshairs are on target, things are different and I always had to make final adjustments.