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Re: Review: Precihole PX100 Achilles

Posted: Fri Jul 12, 2019 7:17 pm
by snIPer
Is there any imported spring that will fit this.
/S

Re: Review: Precihole PX100 Achilles

Posted: Sat Jul 20, 2019 4:22 pm
by Jagannatha
Ok. Received the hummer spring Mk2 and tried it out. Nice power for just 100 Rupees :)
Mk2 is 2-4 mm longer than Mk1. I can only compare them with spacers as I use them. Tested with JSB 0.67 g (10.34 gr). So Mk1 with spacers (5 mm) is 251-253 m/s, Mk2 with spacers (5 mm) is 265-267 m/s. Tested it from 200-130 bar. The speed does not very a lot. I'll post the speed chart here soon.

Re: Review: Precihole PX100 Achilles

Posted: Sun Jul 21, 2019 4:22 pm
by Jagannatha
Here is the results.
40 shots From 200 to 125 bar.
JSB EXACT HEAVY DIABLO 0,67 g 10,34 gr.

So, for me the best range is 185 - 155 bar.

Tried some other pellets at 185 bar. Just couple of shots.
Precipell 0,57 g 8,7gr - 918,635 fps
JSB Monster 0,87 g 13,43 gr - 754,593 fps

Re: Review: Precihole PX100 Achilles

Posted: Sun Jul 21, 2019 11:43 pm
by GNV
The improvement in hammer spring quality is about longevity and not power increase. Both springes are of the same length out of box.

Added in 1 minute 44 seconds:
Dr. Shirsat would never let stock guns out of box to stray over the legal limit.

Added in 3 minutes 29 seconds:
There are a lot more modifications using after market parts and modification for Achilles already proved themselves which can deliver 24 ft lbs with a very reduced shot count per fill.

Re: Review: Precihole PX100 Achilles

Posted: Mon Jul 22, 2019 2:27 am
by Jagannatha
GNV wrote: There are a lot more modifications using after market parts and modification for Achilles already proved themselves which can deliver 24 ft lbs with a very reduced shot count per fill.
Where to find them? )

Re: Review: Precihole PX100 Achilles

Posted: Mon Jul 22, 2019 1:28 pm
by cjpavel5
Hello gnv sir. I am from chennai. Been following your inputs on px 100 for a long time and purchased one recently. You have been of great help. I just want to know how to install a bipod on the px 100 if you could help would be great thank you sir.

Sent from my SM-N960F using Tapatalk

Re: Review: Precihole PX100 Achilles

Posted: Tue Jul 23, 2019 12:01 pm
by Jagannatha
Is it possible to install PX100 Club Pro barrel to PX100 Achilles? They both are 4.5mm. But PX100 Club Pro barrel is 8 cm longer and looks like the outer dia is larger. Do they have the same dia on the side where they are fixed to the chamber?

And one more question. Is it possible to use pallet magazine from some other 4.5 mm rifles? FX Air gun High-capacity magazine?

Re: Review: Precihole PX100 Achilles

Posted: Tue Jul 23, 2019 7:42 pm
by GNV
They are not interchangeable

Re: Review: Precihole PX100 Achilles

Posted: Wed Jul 24, 2019 2:02 pm
by Chengy
My Achilles PX 100 is leaking air from the filling point. Any suggestions as to what could be the problem and remedy

Re: Review: Precihole PX100 Achilles

Posted: Thu Jul 25, 2019 7:33 pm
by GNV
eaglevisioncam.com side cam mount and Casio camera on my Achilles.
WhatsApp Image 2019-07-25 at 7.02.45 PM.jpeg

Re: Review: Precihole PX100 Achilles

Posted: Mon Aug 12, 2019 6:29 am
by Zimik
GNV wrote:20190710_174235.jpg
20190710_174355.jpg
20190710_174439.jpg

Added in 2 minutes 20 seconds:
20190710_174459.jpg
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Added in 15 minutes 21 seconds:
Achilles with MK-2 Hammer Spring without any washers to increase preload
Screenshot_20190620-195656.jpg
Screenshot_20190620-203317.jpg

With an after market spring made by a friend. This one is shorter than the OEM spring but wire dia is thicker
Screenshot_20190620-213105.jpg
Screenshot_20190620-213121.jpg

Added in 1 minute 25 seconds:
Pellet used is JSB 10.34 gn

Added in 1 minute 6 seconds:
The spring in the above photo is the after market spring

Hi GNV,
Thank you so much for the insight on changing the spring.
Well, I find the after market spring made by your friend interesting. Is there any way that I could get hold of one?
:D

Re: Review: Precihole PX100 Achilles

Posted: Mon Aug 12, 2019 4:16 pm
by GNV
yes. You can buy from him directly

Re: Review: Precihole PX100 Achilles

Posted: Mon Aug 12, 2019 10:11 pm
by Zimik
If you could kindly pm me his contact information, I will be very grateful..
Thank you so much.. :D

Re: Review: Precihole PX100 Achilles

Posted: Thu Aug 15, 2019 6:19 pm
by Zimik
Hi all,
Some results of hobby shooting with my "bullpub converted" px100 Achilles using G Smith & Co. at 20 yrds.
:D

Re: Review: Precihole PX100 Achilles

Posted: Thu Aug 15, 2019 9:22 pm
by Jagannatha
Scarecrow3 wrote: Also, this one thing i wanted to point out. The rifle comes with an air pressure regulator which is not a very common thing in budget and mid range air rifles. What a regulator does it that it converts the high pressure of the tank into a steady preset pressure in it's own chamber. This exposes each pellet to the same pressure of air with every shot as opposed to a continuously dropping pressure for every shot in unregulated guns. Now this is a great feature with the advantages and disadvantages listed below.

Advantages:
1) Provides consistent velocity ( for tank pressure>regulator pressure)
2) The rifle is less likely to "pressure lock"

Disadvantages:
1) Regulators, even the very best ones have a limited life. The higher the difference in tank pressure vs regulator pressure the shorter the life of the regulator is deemed.
2) One of the simplest methods to modify the power of an unregulated PCP is to tighten the hammer spring or replace it with a more powerful one. The power gain is much less if a regulator is present as the regulator is also a restricting factor in the air flow.
Is PX100 regulated? I can only see a valve and a valve spring between hammer and air tank. Or these valve and spring mean "Regulator"?

Ok. It seams like regulator. I understood the way it works. But how to tune it? Only with Exhaust Valve Return Spring? The weaker it is the more pressure you get in after air tank space?