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Lot of storm systems moving through SD - need the moisture. Saturday is a clear day and then more rain. Hope to zero in an Arken EPL-4 which replaces a Zulus on my L2. I'll be up and about early on Saturday!

Im going to pick up my project benjamin discovery I bought on agn and set it up for 177 and put a scope on it, maybe chrono and see if i want to regulate it. Start designing a power adjuster to machine and knurl for it.

Start refurbishing a 1974/75 crosman powermaster 760 for a friend and machine a rear site elevation ramp for it.

I hope you get your buddy hooked. My circle calls it "scumbagging" . It's how I got them all into pcp rifles with my fx impact.

Have fun!

I have high flow valves in all 3 of my AF guns. Also heavy springs and heavy hammers.
My 2 .25 are both 24 inch barrels and the high flow valve is a must. I was able to drop the reg pressure from 2400psi to around 1700psi with the same FPS.

I also have plenums on them.
One has a Huben Power Max-ATH with a 50cc plenum.
The other has a homemade 125CC plenum.

The plenums supply air to accelerate the pellets the length of the barrel.

This is the 125CC setup.
Tube above the bottle holds 125CC air

JaceSpace1369 said:

My response was referring to the image selection for AGN. Although I did have a G2 it was a 30SL, very nice gun!

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I got ya.

The steel Texoma inserts make the Harpoon a whole new gun.

Update: I unlocked the charge and notified the vendor his money is restored.

Happy ending: I can trust the Harpoon. Plus it's fun as #ell!

Thanks for advice here all.

_Follow-up on Goliath_
After disassembling the gun once more, I clamped the tube vertically in a drill press. Properly lined up the transfer port, and proceeded to enlarge the hole. To reach the port size of 3.5mm as advised by A.G.R., two different drill bit sizes were used. To be precise, the final port size now measures 3.53mm. There was a small burr left at the edge of the hole on the piston side. Used a tapered diamond dremel bit inserted into a wooden dowel rod and chamfered the hole slightly to remove it.



Lubed the piston seal and skirt as before, but for the sake of this experiment, nothing else was changed.
The results were both surprising and disappointing. Only a gain of 9 fps with the JSB Kings.
Before_ JSB Exact King .25 ...........25.39gr............547fps.........16.87fpe
After_ JSB Exact King .25 ...........25.39gr............556fps.........17.43fpe

In the meantime, I'd ordered some H&N FTT pellets to test. They fit tighter than the JSBs, but yielded better numbers than the heavier pellet.
H&N FTT............................20.06gr.................653fps.........18.82fpe

Interesting to note: the gun doesn't seem as loud now. I almost needed ear plugs before, but now it's better. Figure that one out.

I get a kick out of my .22 Kral Empire XS every time I pick it up. Hits in the same place every time I shoot it, gets a decent shot count, is compact, and it is made of solid and metal parts in places where they could get away with using plastic. I was very pleasantly surprised the first time I disassembled it - looks like it was designed by someone who cares, understands, and shoots the guns.

I don't think higher regulator pressure and the associated higher hammer spring force should hurt the gun but I have found it harder to get a gun to do something that it wasn't really intended to do. My P35-25 shoots JSB 34 grain pellets the best but cannot consistently get them going 800 fps. I have achieved it a few times but the hammer spring is weak so the regulator pressure cannot exceed about 150 bar or the hammer won't open the valve. Shimming the hammer spring let me get a few more fps but it seemed like every time I wanted to shoot the gun a little the velocity had fallen under 700 fps because the hammer spring wasn't putting out enough force because the temperature of the air had risen making the valve a little harder to open or something. So I would lower the regulator and get it working again and then have to repeat it later. So I recent just backed the regulator down about 1/4 turn which allowed me to remove all the shims from the hammer spring. Velocity is only about 730 but the gun shoots fine and I'm hoping it will the next time I pull it out. The hammer spring is not at maximum but is close. (I tried a reduced size poppet this week but it didn't work for me, velocity did not go up with a 0.5mm reduction in size apparently due to a little shape difference. When I reshaped the reduced diameter poppet it wouldn't seal and I went back to the OEM poppet. I may still mess with that some more)

If all you have to do is increase the regulator and the hammer spring and the gun cooperates, I think you are within it's design parameters and it should work fine. To me, doing this to get 800-900 fps from a pellet the gun likes is a good and reasonable thing to do. Doing it because your buddies gun makes 50 fpe and you think yours should isn't something I would support. I want enough velocity to have good accuracy and trajectory but the power can be whatever it is.

Another parameter is how much space there is between the fill pressure and the regulator pressure. My Avenger arrived with the regulator turned up to 2900 psi or something like that and I immediately degassed the gun and turned it down. I was hand pumping when I got it and 300 bar is a lot of work to hand pump a gun to. I use a compressor and a bottle now but the bottle only goes to 300 bar so the gun never really gets filled to that unless I fill directly from the compressor. My usable shots are only down to the regulator setting or a little below. So with the original setting ~4000-2900 psi. I now have it at about 2200 psi so I have 700 psi more air in each fill to use. One of the neat things about my Caiman X is it will send 18 grain Baracudas 900 fps with a 100 bar reg pressure. It also fills to 300 bar. So it gives me a lot of shots. I've tried slugs in it and they shoot reasonably well and it can get them going fast with more regulator pressure but the barrel is choked and accuracy is not as good as pellets at any tune I've tried. So I'll probably retune it for pellets soon.

I think it's a good goal to find what your gun wants to shoot and then tune it to do it as accurately as possible. I think trying to make a gun shoot a particular pellet well or at a particular power level is kind of fighting with the gun and you might not like the outcome as much as you think you will.

Vana2 said:

The advertisement says that it will fit a .22, just be sure to read the fine print.

The Teslong that I got a couple of years ago was around $50 and works with the included mirror attachments.

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The adertising on mine also indicated that, which is why I want to confirm that it will fit the bore of a .22 air gun. The muzzle choke is an additional problem, as you know. I'm very tempted to purchase but my experience suggests that it may not fit.

inverted said:

Haven't really checked the c clips.
They don't have to be tight in their grooves, they just need to be in the grooves enough not to fall out so the part they are holding is secured in its own place

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I beg to differ. A c clip/snap ring that can move in the piston wrist pin groove can erode the groove material and become looser in the groove. This is a disaster in action for engines, and not something I risk in compressors. All my training in the mechanical fields and nearly (70) years of experience advises against that.

Even the "wire ring" type wrist pin clips need to be placed with the open end of the snap ring pointing in line with the stroke or it is likely that the ring will loosen, come out of the groove and destroy piston & cylinder. Two stroke engines often suffer this failure.

If someone doesn't agree, that's up to them. I am simply offering the caution in case it is helpful to someone.

I was helluva surprised for sure.
Maybe she is like me, as a kid shooting 15 and 50 M rimfire, or 200 M 7.92 mm for that matter, some of my best series i always shot some of the first times on each distance.
Later when the wind calmed down ( 30 M somewhat in the wind shade of the barn yesterday ) at the same distance she was shooting the fairground shooting gallery clays ( about 10 X 50 mm in size with the 40 mm visible ) at the same distance, but just taking a few mm off the top in every shot. ( like we told her to do CUZ otherwise you can easy take those out with 1 shot center mass or down low on it )
She also connected on the clays few times at 75 M with the pellets, but really at that distance with .177 you need a measure of luck too.

I also needed a little luck with the same clays at 118 M, but i did get two in a row at one time, that was a arms in air moment.

She insisted of a repeat, both the grill food my friend whipped up, but also trigger time on the Maverick.

Ranchibi said:

Another incredible haul! Boy...you must stock pile ammo..... Great shooting and photos!

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I really should, cause I really don't . Thank you!

Kgphotos said:

Scopewerks

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Thank You!

JimD, your tip on calling Krale was a very helpful to me.

If I had not called them, my P35X would have stayed with UPS for who knows how long, and never shipped back to Krale like I thought.

I have the utmost respect for Krale. They are good folk and very easy to deal with. I will use them again when tariffs are not a big issue.

Once I called them, everything moved faster, and they gave me my options. Within and hour after getting off the phone with them, I had an email saying that they would contact UPS, find out the fee for shipping to them, and then get back to me.

It took a few days for email response, but they did respond.

However, calling them is absolutely the best way to get action. Using your mobile phone's wi-fi calling doesn't even incur a charge as long as you keep airplane mode on.

Around here, asking questions like "Should I...." is only gonna generate one response....Yes you should

AGN is just a huge den of unrepentant enablers spending other peoples money...... I can speak with some authority on that because Ive been on both sides of that......

The next model/upgrade for any product is always around the corner. Buy what you have a need for NOW and ignore the eventual upgrade notice....