BC for JSB Polymag

Steve of AEAC did a video and using his data I calculate a BC of 0.043:


MV = 894fps
Range = 50y
IV = 760fps
➠ BC = c. 0.043

Matthias


Link (data at 13:27min):

vintageairguncollector@gm said:

Thank you for your help, I will check the bottle and filling adaptor. Really, I am new to bulk fill airgun usage. I hope someone at the Baldwinville NY
show can help get the airgun working again. Sergey72 are you going to the NY show this year?

I have one of the adapator that allows you to use a 12 gram cartridge.

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12 gram adapters can send "grinding fines" from piercing down stream. That's why the crosman 600 had a screen and filter before the valve, can't remember the filter material but definitely remember the screen. In the beginnings of paintball that was the number one thing screwing up the cup seals (exhaust valve pin seal in the firing valve). They can certainly damage or pollute a filling check valve. Unfortunately, I've never been to the New York show and it's too short notice to schedule.

Shooting in that field is always an adventure. I always get bit by some unseen breeze coming from the left behind Ron's house. Sunday was no exception!
Good course, great group of shooters. Thanks to Ron and Scott for setting up the course.

Chas

This is not an expensive item at $20.00, but it's junk none-the-less. The attachments completely stripped out when installing and it's useless now unless I cobb something together. On top of that, if you use broadheads the shroud is too small to completely cover them so the blades are exposed and can be impacted unintentionally very easily.

Save your money, blood, and headaches and carry the bolts in a safe, detached shoulder-carry quiver or similar.

They're all pre-set for the indicated pressure for whatever gun it's going into (he made them for many different makes/models of airgun). If it's for a Mrod it'll be set at the proper bar. If YOU want to adjust it differently email him & see if he can mark different pressure settings (if it's the original mfg/seller). It couldn't hurt. If it's a second party seller you're probably SOL.

I got light into the rebated portion of the muzzle and could see no threads. But when I worked in machine shops I would have been fired for leaving such a rough surface. Guess I will have to talk to DonnyFL about a unique adapter for these guns. Be Well Brothers, Bandito.

h2okenny said:

I'm curious about this as well. I was really into the Airforce airguns 8-10 years ago. The o-ring under the top hat worked really well. Just received a Talon SS in .20. Would an o-ring help/hinder or really not have much effect one way or the other with the ring loc kit?

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I use one in conjunction with the ring loc. Try it. If you don't like it, take it off. Easy peasy

Great post! I will have to send the link to my friend.

Posted for David Slade

Invicta July 13th match report

We had ten shooters come out to play in the heat, actually it was tolerable down in the creek area, plenty of shade, maybe eight degrees cooler than the top of the hill.

I decided to not bring a coat, I also put a new flip compensator on, but I was just too hot and lazy to check my zero, and that resulted in my horrible score, I also cleaned my barrel and didn't lead up the barrel before the match started, so basically I am using three excuses....

The wind caused some misses for us folks shooting lower power, regardless, Danny kept with his shooting jacket, and his cool, and got the top score of the day, way to go! Nipping at his heels were Bill in Open class, and Brad shooting Piston class, both shot a 52, I tip my hat to Brad, shooting 12 ft lb AND piston class and only being one point off the top score it some excellent shooting. As usual, Brad was the first one there, trimming lanes and making the course better for everyone.

We had a new shooter, Matt Judd came out to shoot in Hunter class, he is a very experienced shooter in other disciplines, and his first ever FT match he shot a 48!! I hope he moves swiftly onto one of the other classes to really show his full potential. he said after just one match he has the FT bug!


Match Winner
53/60 Danny Ayers Thomas March 10-60 JSB 8.4

World Class
53/60 Danny Ayers Thomas March 10-60 JSB 8.4
46/60 Grant Summerlin Anschutz Sightron 10-50 JSB 7.9
39/60 David Slade Steyr Nikko 10-50 JSB 8.4

World Class Piston
52/60 Brad Troyer TX200 Sightron 10-50 AA 8.4

Open Class
52/60 Bill Ellis Thomas Sightron 10-50 JSB 13.4
48/60 Mike Wright Thomas Sightron 10-50 JSB 10.3
46/60 Jeff Hale TM 1000 Nikko 10-50 AA 10.3

Hunter Class
48/60 Matt Judd FX Crown Element Helix JSB 10.3
24/60 Grey Summerlin Daystate AW Vector 10-40 JSB 10.3
18/60 Brent Browning Diana 54 Athelon @16x HN FTT 8.64

MikeVV said:

So yeah...right !

Again, removing the factory sight leave nothing for any dot sight to attach to. Simple as that.
Unless you want to mill a flat, and tap two screw holes yourself.

Mike

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Did you see my sigguy link to the armory craft adapter plate? It screws in the hole for the elevation adjustment screw.

Beanflip said:

Those a great groups!
Ive shot mine a little and taken some speeds. Shoots a little fast and loud. I’m trying to turn the reg down right now but it seems a little weird. I’ve followed the directions but it’s fighting me. It went down a little but I’ve had to try adjusting probably 6 times. Finally ran it all the way CC and it appeared to be going up!

SO now I ran it mostly CW. Will see how it goes.

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I shot mine at 50 yards and it should do 1/2” groups no problem if I do my part. Here’s a quick target I shot. Kinda confusing groups cause It was windy and some I was adjusting scope. The jsb 20.89 shoot great. That bottom group is in a line cause my target was moving back and forth in wind. I did get a nice 4 shot group
I hear the reg has course threads and you barely move it. I’d like to turn mine down a tad. Unfortunately mine has a leak and might need to go back. Sucks.

Septicdeath said:

Jewelry stone setting burrs

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Thank you

From my several hundred experiences, yes.
Save your energy. Have a coffee, shoot some lead and smile.

This month the green course was along the road with a few lanes in the sun, the red course was in the upper part of the ravine, and the blue course, as usual, was setup on the competition rifle range. The day was hot (~95F) and mostly sunny.

The 3 course average difficulty was 28.7 (moderate) and the individual course sections had the following avg difficulties (not including environmental factors):

• Blue - 28.8 (moderate)
• Green - 28.0 (moderate)
• Red - 29.2 (moderate)

Scores - Each course is a possible 20, and the 3 course total is of a possible 60 (ties are not broken).
2024 Seasonal PSA FT scores are available at PSA 2024 FT League Results




The XFT course was setup on the competition range. There were 10 targets, 7 targets were kill zone type targets and 3 targets were knock down style targets.


Scores for the 20 shot XFT course are:


Thanks to everyone that showed up, and special thanks for those that helped clean up at the end.

AirGoon said:

That would be great Chas, especially as none of us has one!

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Darn I wish I was closer

cavedweller said:

For expediency I use Ballistol spray gently swirling in a rubber maid container and spread out on paper towels-I reuse the container
But
Rod B has a even better method

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I use liquefied bees wax as a lube solution without washing and my so's dropped into single digits

They didn't shoot better than JSB 50.1gr in my Paradigm. I also tried the AEA 50.1gr and it didn't do that well either. Both shot about 1" groups at 53y, whereas the JSB shoots .5" groups, actually a little smaller than that, you just end up with a wide single hole. The Hades do the same thing, but the most accurate so far has been FX Hybrids/RMR ammo. That's the thing to take away from this, FX/RMR are so accurate that I will not change my tune for the other pellets and the JSB just happen to be the most accurate with where it's at. If you tried different speeds the the Zan's could very well be more accurate for you.

220Swift Creation for FT use.......

Firewalker said:

Look up HUMA inline regs.

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Totally forgot about it, thanks!!! Added to the top post! Yes that's a good option, the only problem is that it has only one gauge showing output regulated pressure, no gauge that would show input pressure inside the tank. Ninja comes with two gauges.

Mikelo123 said:

Evening All!

Have enjoyed diving back into the hobby this past month or so (man has there been a ton of changes and advancements)!!

Currently throwing all my focus around 100 yard bench rest and have numerous contenders in the stable I am testing out.

One is a RAW HM1000x .22, put it through its paces today and one thing that blew me away was how well it grouped not only the 25.39 Monster Redesigns but also the JTS 22.07 (flying at 1010 fps!). 100 yards 40 shots. Apologizes for not posting with a measurement or thumb nail etc. to give a sense of size but measured 1.30 inches from far left to bottom edge of far right.

View attachment 479945

This was with a middle of the road scope, 24x magnification, rear bag and Atlas bipod sitting on a 4 foot long card table and a lawn chair so not the most stable setup.

Not sure if this one will make the cut for my intended purpose (have 13 more to put through their paces) but sure was surprised to see a fairly light weight .22 pellet group so well at that speed and distance.

Anyways just thought I would share my findings and throw this out there for other HM1000x .22 owners.

Be Safe,
Dr. Mike Long

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What are you shooting the 25.39 monsters at ? Just 22.07 at 1,010 fps is flying ! The 25's must be going about 990 fps ?

Peashooter said:

It is a nice case, so i looked it up, the damn thing cost 430 USD here

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I bought mine when Pelican had a 4th of July sale. It was only $270 USD with tax and free shipping.

If you haven't seen the earlier episodes, go get caught up by visiting the Playlist linked below.

Gotcha. So, that part should be okay.
If it shows a leak at the Delrin (oiler) nut, then it is leaking from the inside O-Ring. The Delrin nut should not be tightened for leakage, you'll break it. It's only there to hold the oiler felts, nothing more.
I am assuming that you cleaned the inside of the cylinder extremely well before replacing all of the innards, right? There can be a buildup of gunk inside if it's not cleaned, this will cause leaking and since liquid is not compressible, you won't be able to get the pressure much past 1,000PSI, if at all. DO NOT use any sort of wire brush on the cylinders, it will scratch the surface and will not seal with the O-Rings afterwards. I normally use Goo Gone or similar with cotton swabs and pipe cleaners, then a final flush with Goo Gone, then flush that with water. Allow to dry well or blow-dry with dry air, then reinstall all of the innards and try it out.
You're not getting a good seal with the O-Rings inside.

Mike

I had issues with POI shifts in my avenger and one item you may want to check is the spring adjustment screw. If you do a lot of tweaking like I have done, the screw gets loose and the vibrations shot to shot will have it moving. The avengers do not have a set screw for the hammer spring tensioner unlike guns like Hatsan which you had to loosen the set screw before adjusting the spring. I fixed mine by drill and tapping two M5 holes in the existing screw holes to both sides of the tensioner assembly. Repleced the old screws with M5 grub screws with nylon tips. This allows you to lock in the tensioner screw by tightening the grub screws on the left and right. Does not require disassembly since the grub screws can be accessed with the receiver in the stock.

good info, thanks