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Shot consistency is very good, with a standard deviation…Read more

Here’s a bit more information regarding HST adjustment:

Base adjustment: 659 FPS (as above)

+1 Rev: 706 FPS

+2 Rev: 723 FPS

So there’s a bit of wiggle room with spring tension.

The thing that stands out about Lelya is that it’s just fun to shoot. Lelya is always the favorite of the party. Everyone, ladies…Read more

Here’s a bit of data from a MagnetoSpeed chrony on a .25 Lelya shooting JSB 25.39s. I’ve made no changes to the gun as shipped, except to re-crown the barrel. At the point of this test, it has fired 400 or so rounds. Starting tank pressure was 200 bar.

Using a Vortex red-dot sight, accuracy has been very good at 25 to 40 yards.

FPS for…Read more

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The compressed gas industry goes to great lengths to prevent incorrect connections among gas cylinders. Every type of gas has standard fittings that don’t interchange with fittings for other gasses. For…Read more

For engineering and design work there are computerized air models that give good results at high pressures.

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Have a look here for a spreadsheet showing the potential energy in the tank:

http://talonairgun.com/forum/viewtopic.php?f=11&t=30556&hilit=X356b

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Here’s a post with a photo of TTTA and Altaros regulator. The combo works well if the LOP is not too much.

http://talonairgun.com/forum/viewtopic.php?f=4&t=32036&p=324343&hilit=X356b+regulator#p324343

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The advantage of the Magnetospeed is that the bayonet mount is easy to use in a variety of…Read more

There’s a socket on the bottom of the grip and also on the bottom of the butt for flexibility in…Read more

Thanks for the reference. That’s a good durability test.

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The thread posted below has a good discussion of issues arising with non-standard use of air tubes. The only folks who should be fiddling around with non-standard applications are skilled in pressure vessel design, and are working in a controlled development environment.

For the rest of us, it is best to follow the manufacturer’s…Read more

From the posts on valve performance I’ve concluded that, in most cases, lighter is better. The condor breech transmits the hammer strike to the valve. A heavier breech would tend to slow down the valve opening and valve closing.

There are some other dynamic effects such as hammer bounce that may be less troublesome with a lighter…Read more

I’d guess the chrony measured the pellet that passed through the shroud in advance of the shroud launching.

6000 foot pounds would have blown a hole through the backstop and probably the structures behind. A 300 win mag is only 3500 foot pounds…

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I have not seen the video, but this calculation says that the frame extender exited the front of the rifle at 944 fps.

Really? I need to see this video…

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I have only subjective impressions on noise. The .22 Condor SS, shooting subsonic, is quiet enough that my neighbors don’t notice. The RWS is also this quiet. The RWS is running at a much lower power level. So, you get a lot more power from the Condor SS for a similar noise level.

Shooting light pellets at supersonic levels will…Read more

I’ve got an RWS model 54 (similar mechanicals to the model 48). The model 54 is a great shooter. It is a very refined springer. It now sits lonely and unused since I’ve acquired PCP guns.

My first PCP was a Condor SS, which required all sorts of tinkering to get it to shoot the way I like. As you can tell from this forum, AF…Read more

This is how we got the younger shooters to practice some marksmanship…

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Operationally the EDgun has just worked reliably and…Read more

This added adjuster screw might be a good retrofit for older Lelyas. It’s just a threaded hole through the end of the slide positioned to align with rearmost part of the bolt/toggle assembly.

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The first is when the bolt does not lock up properly. This is the really annoying condition where the bolt moves back far enough to allow a blast of air to get past the bolt.

The second condition is when the bolt moves back a bit during a shot and remains locked up.…Read more

The adjuster screw at the back of the slide sets the depth of the bolt when the slide is all of the way forward. The bolt needs to be far enough forward for a toggle on the bolt assembly to flip into a pocket in the breech assembly and lock the bolt in the forward position for firing.

The toggle is…Read more

I made a couple of minor tweaks to get her shooting to my satisfaction.

I’ve reduced the hammer spring tension a bit. It’s getting 20 ish shots per fill (200 bar to 110 bar indicated).

Don’t know muzzle velocity yet. Need to get an optical chrony going, the…Read more

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Most of the lower priced, non-target, rounds will shoot 5 shot groups with a muzzle velocity standard deviation between 15 and 20 FPS.

High end ammo such as Eley Pistol Match shoots all day long with an extreme spread…Read more

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I’ve installed Magpul type 1 sling mount sockets as shown in the photos below. The OD of the socket is 1/2″. I drilled the stock with a 1/2″ Forstner bit for a clean cut. The socket is set with a bit of epoxy and a wood screw through the bottom of the socket into the stock.

It’s a very clean install and gives sling pick-up points that…Read more

Nope, that’s not good.

Here’s a good one. Add the Vermouth shown for a pretty good Manhattan…

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No CO2 adapter, just the Altaros and TTTA.

The LOP increases by 4″, which is quite a bit. This works for me because I’m kind of big. The problem is that the Condor has become kind of hard to share due to the excessive LOP.

I’ve just ordered one of Tony’s carbon fiber tanks. This will shrink the LOP by 1.25″ (ref: TalonTunes web site).

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There’s a good article in Wikipedia on this topic. The usual test is to 5/3 working pressure while measuring cylinder volume. If the volume doesn’t return to normal when the pressure is released, the tank is removed from service.

Luxfer advertises a minimum burst pressure of 2.5x working pressure for it’s cylinders. Don’t know about AF…Read more

My first impression is that they a group bit better than the JSB 25s. In particular, the two tins I got from from Tony, although they were well packed,…Read more

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If you take apart the mechanical actions going on in one shot, you’ll see the complexities.

The hammer strikes the…Read more

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I have a .22 Condor SS. I’m using an Altaros set at 1850 psi coupled to a Talon Tunes Tank Adapter. This combination has some interesting characteristics:

First a rather long length of pull, which is just fine for me, but difficult for persons of a more normal stature.

Second the TTTA adds regulated air volume (volume between the…Read more

Just like the old postal leagues.

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Lurker, consider that the POI and scope line of sight intersect at the target. Because of this, cant error produces the same impact circle regardless of scope height.

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That’s a good observation on the “split the difference up close” setup. Thanks!

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On Condor SS or EDGun just mount to the left or right instead of underneath.

Readings are reliable for muzzle velocities of interest. For very low velocities or low mass pellets it won’t…Read more

On a technical note, there’s another factor that uses up safety margin, and that’s fatigue. The more the tank is used, the weaker it gets.

So, there a number of things that eat into the safety factor, tank manufacturing variations, gauge error, operator…Read more

Assume a ballistic coefficient of .141, which is just a guess from looking at various.45 bullets flying subsonic (ref: Sierra Handgun BC PDF).

iStrelok shows the…Read more

Just a few observations:

Barlow’s formula is a good starting point when designing the bulk part of pipe or pressure vessel. But that’s the easy part. Connections and end fittings require careful attention, and are usually trickier to get right.

Any high pressure system has design goals, such as deformation under load, number of load…Read more

– consistent good power over a wide range of conditions (temperature 90 F to -15 F),
– operationally tolerant of real world conditions (added a rubber plug in fill port to keep the dirt out),
– easy to maintain.

Other shooters that I’m with…Read more

I suspect that the the answer to this valve question involves considering a few more forces on the valve. Consider the following scenario:

The valve is held shut by spring force and force from the difference in gas pressure between the tank and firing chamber. This force due to pressure is greatest when not firing (chamber is at…Read more

The Magnetospeed works with .22 pellets above 700 fps with very few problems. I’ve used it a bit at lower velocities. In this case, it’ll work with the right setup.

The unit occasionally throws a “comparator mismatch error,” which means the two internal timers didn’t match. I’ve never seen the mismatch greater than 1 fps. No shot…Read more