EDgun Edgun Leshiy 2

[lesh]

Possibly you're blowing a lot of air after the projectile has left the barrel. If you like more power I'd try with a heavier projectile.

Aha! Thanks for your reply airman Interesting point - I’m using 44.5gn slugs currently maybe I’ll try 55/60gn and see what happens with them - because I surely don’t wanna go smaller on jets or higher on reg pressure as would be so inefficient and overcooking it a bit…..

Anyone else care to chime in ?

 

[bigHUN]

... because I surely don’t wanna go smaller on jets or higher on reg pressure as would be so inefficient and overcooking it a bit…..

I have no interest in 30 cal and cannot / don't want to comment on that .

But I spent a long enough time in this game with jets to figure out what combination doing what.

First, you didn't said what is you barrel length. You just said the jets are 0.1 and 0.2.

So a wrong combination is leading you in a wrong way.

0.1 and 0.2 jets keeping the Dwell open for long = possibly wasting a lot of air.
Short barrels with wrong - long Dwell = possibly wasting a lot of air.
And here it comes the low fpe, you blew the air in the air and not to propel the projectile.

Larger number of jets will close the air blast faster until the projectile is still inside a longer barrel rifling.

 

[lesh]

I have no interest in 30 cal and cannot / don't want to comment on that .

But I spent a long enough time in this game with jets to figure out what combination doing what.

First, you didn't said what is you barrel length. You just said the jets are 0.1 and 0.2.

So a wrong combination is leading you in a wrong way.

0.1 and 0.2 jets keeping the Dwell open for long = possibly wasting a lot of air.
Short barrels with wrong - long Dwell = possibly wasting a lot of air.
And here it comes the low fpe, you blew the air in the air and not to propel the projectile.

Larger number of jets will close the air blast faster until the projectile is still inside a longer barrel rifling.

I did mention in the original post that it’s a 350mm barrel - I started with bigger jets and with the same reg pressure I was getting only about 830 fps - max I got was about 918 fps average - with 2 x 0.1 jets - so I swapped one of them for a 0.2 and lowered the reg a ting little smidge and it’s at 905 now -

 

[bigHUN]

350 barrels in my eye - a toy , and you can never tune the gun for a good shot count.
My .22x500 barrel, 2x0.8 jets, 75 bars on Reg - over 14 mags shot...

 

[lesh]

350 barrels in my eye - a toy , and you can never tune the gun for a good shot count.
My .22x500 barrel, 2x0.8 jets, 75 bars on Reg - over 14 mags shot...

Appreciated - all I want is compact power! 2 or 3 mags will do for my needs…..

 

[TempleDan]

Kind of off subject that you folks are talking about but, I’m considering buying an L2 in .25 with the intent on changing everything to a 9mm.
Existing setup is 600mm and I’d like to keep that configuration for the end power to hunt coyotes and such. My question is, what all does it take to make such a conversion and which barrel might be the best candidate in a subMOA 600??

 

[Sergey1972]

Kind of off subject that you folks are talking about but, I’m considering buying an L2 in .25 with the intent on changing everything to a 9mm.
Existing setup is 600mm and I’d like to keep that configuration for the end power to hunt coyotes and such. My question is, what all does it take to make such a conversion and which barrel might be the best candidate in a subMOA 600??

9mm is a special setup and your best bet is to buy the 9mm. Downgrading 9mm works. Upgrading to 9mm will be a challenge.

 

[iFish]

Kind of off subject that you folks are talking about but, I’m considering buying an L2 in .25 with the intent on changing everything to a 9mm.
Existing setup is 600mm and I’d like to keep that configuration for the end power to hunt coyotes and such. My question is, what all does it take to make such a conversion and which barrel might be the best candidate in a subMOA 600??

As pointed out by @Sergey1972, the 9mm L2 is a special setup. IMHO, you'd be better off buying the 9mm up front.

I bought the 9mm L2 (450mm) and it rocks (and it's loud, not a backyard shooter, and it's heavy, needs a tripod or at the very least, a sling). The only thing I had to do to switch to .22 (which is how it is currently setup), was put the .22 barrel in and use .22 mags (that will set you back another 600+ and it doesn't lose any weight as the only difference in the barrels is the ID or bore, OD is the same), which takes about 5 minutes.

The L2 is already expensive. Downgrading it, though still expensive as hell, will be easier than trying to upgrade it. Going the other way will be even more expensive. Just changing out the plenum to match the one that comes with the 9mm setup (it is larger so it has the air volume to push that 9mm pellet / slug) will set you back a pretty penny. Then the barrel and mags on top of that and pretty soon you're taking out a second mortgage (j/k).

 

[Mike1983]

Very nice looking gun

 

[lesh]

Hello fish, when you downgraded the barrel calibre on the 9 to a 22 were you able to achieve the same fpe with the smaller projectile ? What barrel length do you run and what jet sizes have you tried ? Thanks

 

[iFish]

Hello fish, when you downgraded the barrel calibre on the 9 to a 22 were you able to achieve the same fpe with the smaller projectile ? What barrel length do you run and what jet sizes have you tried ? Thanks

Hello @lesh

First, to add perspective, I purchased this early March of this year, so it is still very new. It took a minute to save up enough to get it. I don't regret that.

fpe (or regulator)
I turned down the reg from default 130 bar to 100 bar for .22 (it will go back to 130 bar when I switch back to .357). I wasn't looking for fpe, I was looking for accuracy and thought that was a good starting point for .22 (and 130 bar is a good starting point for the .357 as it is factory default). That, coupled with again, the larger plenum pushing the .22 much better and also, to assist in reducing the bark when firing. I'm still trying to determine which pellet / slug it likes best as I have a limited number of different kinds. That quest will take me a minute as it takes time to gather different kinds. The reg will be adjusted once I find a pellet / slug it likes (probably going up in bar) to get fpe / distance without losing accuracy. This will take a minute also.

Barrel
At purchase I got the 450mm subMOA barrel (which is standard for the 9mm, you just have to choose the length you want) as it is a solid steel barrel and supposedly, the best currently offered for the L2. In hindsight, I wish I would have gotten the 600mm barrel length. The reason is due to the shorter the barrel, the louder the bark. It's pretty loud. I do shoot in the backyard only because I have reasonable neighbors on each side. I don't know about my other neighbors as the neighborhood has several rental houses and they are always rotating renters in and out. So I'm guarded as to when I shoot and how much.

Jets
As to the jets, I haven't messed with that yet. It still has the larger jets that are standard with the 9mm. I'm kind of hesitant on changing out the jets as like I said, the 9mm comes with a much larger plenum and reducing the jet size will just cause it to be slower in filling that plenum once the trigger is pulled. Other than filling the plenum faster, hence affect how quickly you can pull the trigger, it is unclear to me what changing the jets will do to the overall fpe / accuracy of the gun. Maybe you can enlighten me on that?

I think I've addressed everything... Let me know.

 

[bigHUN]

Jets has nothing to do with a plenum.
The Reg controls the bar pressure in the plenum.
The plenum volume feeds both (in the brass bell) the projectile launch also the mag indexing mechanism in R2D2. Too low is not good too high is not good for indexing.
Jets control the Valve Dwell=timing (how fast the white teflon bell opens and closes), but actually balancing the available air volume (in the plenum) between the projectile also the indexing.
And more complicated if we want to go more into analizing.
Simple put - You don't want to know

 

[Sergey1972]

Hello @lesh

First, to add perspective, I purchased this early March of this year, so it is still very new. It took a minute to save up enough to get it. I don't regret that.

fpe (or regulator)
I turned down the reg from default 130 bar to 100 bar for .22 (it will go back to 130 bar when I switch back to .357). I wasn't looking for fpe, I was looking for accuracy and thought that was a good starting point for .22 (and 130 bar is a good starting point for the .357 as it is factory default). That, coupled with again, the larger plenum pushing the .22 much better and also, to assist in reducing the bark when firing. I'm still trying to determine which pellet / slug it likes best as I have a limited number of different kinds. That quest will take me a minute as it takes time to gather different kinds. The reg will be adjusted once I find a pellet / slug it likes (probably going up in bar) to get fpe / distance without losing accuracy. This will take a minute also.

Barrel
At purchase I got the 450mm subMOA barrel (which is standard for the 9mm, you just have to choose the length you want) as it is a solid steel barrel and supposedly, the best currently offered for the L2. In hindsight, I wish I would have gotten the 600mm barrel length. The reason is due to the shorter the barrel, the louder the bark. It's pretty loud. I do shoot in the backyard only because I have reasonable neighbors on each side. I don't know about my other neighbors as the neighborhood has several rental houses and they are always rotating renters in and out. So I'm guarded as to when I shoot and how much.

Jets
As to the jets, I haven't messed with that yet. It still has the larger jets that are standard with the 9mm. I'm kind of hesitant on changing out the jets as like I said, the 9mm comes with a much larger plenum and reducing the jet size will just cause it to be slower in filling that plenum once the trigger is pulled. Other than filling the plenum faster, hence affect how quickly you can pull the trigger, it is unclear to me what changing the jets will do to the overall fpe / accuracy of the gun. Maybe you can enlighten me on that?

I think I've addressed everything... Let me know.

What BigHun said + plenum is the supply air for firing cycle. Big plenum makes sure there is less pressure drop during firing cycle. Too small and you can't generate the FPE you want. The Jets control how fast the valve Closes. If you increase jets = faster closing, and velocity does not go down you were wasting air = less shots and louder. Try the settings from the chart (i think two 1.2 jets for .22)

 

[iFish]

Can you explain to me what "Dwell Time" is please?

 

[Sergey1972]

Can you explain to me what "Dwell Time" is please?

Dwell time is how long the valve stays open. Valve opens, pressure builds behind pellet, it starts moving, valve stays open as pellet starts travel, dwell ends and valve closes, air expands as pellet continues down barrel. Long dwell time more full pressure air behind pellet farther down barrel, diminishing results for final speed, increasing wasted air. Search function is your friend. Better explanations available than I'm capable of writing. Faster closing time= shorter dwell = better efficiency = more shot per tank = quieter firing.