Review: Precihole PX100 Achilles

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Jagannatha
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Re: Review: Precihole PX100 Achilles

Post by Jagannatha » Thu May 28, 2020 1:11 am

Today tried to shoot at 70 m with PX100.
Pellet JSB Monster Diablo 0.87 g (13.43gr).
Speed 280 m/s (918,635 fps).
Used 6-24 scope and bipod.
The group is 3.435 cm (1.69 MOA ) horizontal and 1.861 cm (0.91 MOA)
vertical. Happy with the results. Especially with vertical. Horizontal - it may be my mistakes.
IMG_2321.jpg
IMG_2322.jpg
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hz_ralsun
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Re: Review: Precihole PX100 Achilles

Post by hz_ralsun » Sat Jun 20, 2020 9:03 pm

I am assuming you are shooting indoors.. Even my fx Impact or my kalibrgun Cricket .177 calibr cannot attain such results on outdoors.. to attain such results the condition have to be perfect with 0 wind. My px100 stock cannot get a good grouping beyond 35m (outdoor). And what Mod did you do to your gun to attain such velocity, shooting a 13gr pellet at over 900fps?

Jagannatha
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Re: Review: Precihole PX100 Achilles

Post by Jagannatha » Wed Jun 24, 2020 5:16 pm

hz_ralsun wrote:
Sat Jun 20, 2020 9:03 pm
I am assuming you are shooting indoors.. Even my fx Impact or my kalibrgun Cricket .177 calibr cannot attain such results on outdoors.. to attain such results the condition have to be perfect with 0 wind. My px100 stock cannot get a good grouping beyond 35m (outdoor). And what Mod did you do to your gun to attain such velocity, shooting a 13gr pellet at over 900fps?
I'm shooting outdoors. I'm in Delhi and the territory is closed with the fences, so I don't have much wind.
As for Mods I've done:
- Drilled and polished the plenum chamber inside. It increased the dia of the plenum chamber and as the result the volume. So that you have more air going out at one time when the hammer strikes the valve;
- Drilled and polished all the transfer channels to increase the dia and let the air go easier and faster to the barrel;
- Added some weight to the hammer by putting in it 3 small nuts on screw with polished edges (to make them round and let them go inside the hammer), polished the hammer itself to increase its traveling speed;
- Added some spacers (nut washers) behind the hammer spring to give it more pressure. Of course it is better to change the spring for more powerful one. But I don't have it and delivery from Ali takes ages nowadays :( ;
- Covered the barrel with a carbon fiber tube of 14 mm outside dia. The inner dia is 12 mm as the outer dia of the barrel. Put it on with epoxy. Hope it helps somehow to reduce vibrations at the moment after the hammer strikes and pellet goes through the bore;
- Used a sound moderator made of aluminum and still. It adds good weight to the end of the barrel. For me it is good, cause I don't shoot much in standing position, more in prone or with my rifle on some rest;
- Added foam insulation into the butt stock to remove this "Empty plastic" feeling and sound. Added some lead inside to balance gun weight distribution.
- Added small Picatinny rail under the stock to fix a bipod. )))
What I've described here is not the instruction to increase the power of the rifle to to go beyond the legal limit. It was just an experiment and of course now the rifle is disassembled and not used any more!

Drilling something - one way ticket. If it goes wrong you'll have to change the damaged part completely!

Also added some 3D printed parts. Such as Cocking lever extender (faster reloading), scope sun shade (as my scope had no shape, kill flash only ) and "8" to fit on the carbon fiber tube
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Thorzhammer
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Re: Review: Precihole PX100 Achilles

Post by Thorzhammer » Thu Jul 09, 2020 5:08 pm

odedratushar wrote:
Sun Aug 06, 2017 7:56 pm
I have tested Precihole Achilles at 100 meter with Scope mounted 3-9x40 on it. //cloud.tapatalk.com/s/598723496cb ... WA0094.mp4

Sent from my vivo 1601 using Tapatalk
Did u tune it or this is whats out of the box power.

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