PCP for Piledriver .177/21gr/950FPS
Select Gate
READ GTA FORUM RULES BEFORE POSTING
GTA Forum Help Desk
GTA Announcement Gate
Dealer Area
GRIP
AirgunWeb Airgun Videos
Airgun Repository of Knowledge
Vendors and Vendor Videos
AirGun Expo 2021
Airgun Expo 2022
Contests and Giveaways!!!
Welcome New Members
In Memoriam
GTA Contributing Members
Shot Show Videos
Hajimoto Productions
Airgun Detectives
Air Gun Gate
BB Guns and Such
"Bob and Lloyds Workshop"
American/U.S. Air Gun Gates
European/Asian Air Gun Gates
PCP/CO2/HPA Air Gun Gates "The Darkside"
Air Archery
Vintage Air Gun Gate
Air Guns And Related Accessories Review Gates
Hunting Gate
Machine Shop Talk & AG Parts Machining
3D printing and files
Buyer's, Seller's & Trader's Comments
Bargain Gate
Back Room
Target Shooting Discussion Gate
Target Match Rules
Shooting Match Gates
Field Target Gates
The Long Range Club
100 Yard Match
Discussions By States
Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Home
About
Help
Old GTA
Gallery
Search
Stats
Login
Register
Advertise Here
GTA
»
All Springer/NP/PCP Air Gun Discussion General
»
PCP/CO2/HPA Air Gun Gates "The Darkside"
»
PCP for Piledriver .177/21gr/950FPS
« previous
next »
Print
Pages: [
1
]
Go Down
Share This!
Author
Topic: PCP for Piledriver .177/21gr/950FPS (Read 1164 times - 1 votes)
)
skorec
Expert
Posts: 1743
yes
Real Name: Peter
PCP for Piledriver .177/21gr/950FPS
«
on:
June 14, 2018, 03:54:36 AM »
Concurrency to “ 250bar Puncher ONE T” can be probably also “ 232bar Gamo Gx-40” Unfortunately we have no any construction details about bought of them.
But construction of Gamo Gx-40 is possible the same as ( Coyote/Chacal /Urban.... ) .Only the barrel is probably 10cm longer.
Do you have any tuning experiences whit them by shooting at 3000PSI ( 180-230 bar ) ?
I am interesting mainly about hammer spring changing/adjusting/preloading abilities.
Some pictures or tuning videos can help most.
Logged
EU, Slovakia
.177 AA S510 Carbine + Delta Optical Titanium 6-24X42 AO for JSB Exact Heavy
.177 Combo (CO2 and PCP ) QB78D + Hawke Vantage 4-12x40 AO for JSB Exact Express
.22 LW/CH moded Noblesse Bullpupn+ Hawke 8-32x56 SF Half MilDot for JSB Jumbo Heavy
.177 LW/CH moded Puncher + KonusPro 6-24x44 for Monster REDESIGNED
177 Poly/NCH moded Puncher ONE-T + KonusPro 6-24x44 for 21gr Piledriver
.177 HW/NCH moded Puncher Pitbull +Hawke Sidewinder 30SF for Monster REDESIGNED+NSA18gr or Piledrivers about 950 FPS
.177 Gamo GX-40 + NikoStriling 6-24x56 for JSB Exact Heavy
spare barrels .177 HW/CH + Hatsan Hercules .177 585mmx15mm TR=18,7
skorec
Expert
Posts: 1743
yes
Real Name: Peter
Re: PCP for Piledriver .177/21gr/950FPS
«
Reply #1 on:
June 19, 2018, 01:00:16 AM »
No any experiences with power tuning at FAC Urban, Coyote or Chacal ?
http://www.gamo.com/pdf-reader/?file=http://www.gamo.com/wp-content/uploads/Coyote-full-rifle-Rev08.pdf
«
Last Edit: June 19, 2018, 01:03:12 AM by skorec
»
Logged
EU, Slovakia
.177 AA S510 Carbine + Delta Optical Titanium 6-24X42 AO for JSB Exact Heavy
.177 Combo (CO2 and PCP ) QB78D + Hawke Vantage 4-12x40 AO for JSB Exact Express
.22 LW/CH moded Noblesse Bullpupn+ Hawke 8-32x56 SF Half MilDot for JSB Jumbo Heavy
.177 LW/CH moded Puncher + KonusPro 6-24x44 for Monster REDESIGNED
177 Poly/NCH moded Puncher ONE-T + KonusPro 6-24x44 for 21gr Piledriver
.177 HW/NCH moded Puncher Pitbull +Hawke Sidewinder 30SF for Monster REDESIGNED+NSA18gr or Piledrivers about 950 FPS
.177 Gamo GX-40 + NikoStriling 6-24x56 for JSB Exact Heavy
spare barrels .177 HW/CH + Hatsan Hercules .177 585mmx15mm TR=18,7
Motorhead
Field Target Shooter .... Stand em up Shoot em down
GTA Senior Contributor
Posts: 17757
2019 GTA Hall Of Fame Recipient
Real Name: Scott
Re: PCP for Piledriver .177/21gr/950FPS
«
Reply #2 on:
June 19, 2018, 01:23:21 AM »
21 grains at 950 fps out of a .177 takes some serious pressure and a fairly long dwell period. Here in the states those chasing that power of @ 35+ ft lbs is SOOOOO much easier & more efficient with a .22 cal bore size.
Logged
Northern California ... Old Hangtown
**
Home of MOTORHEADS AG Tuning Services
**
* PM me for further contact & tuning info.
Sacramento Valley Field Target Club
#
https://sites.google.com/site/sacvalleyairgunclub/
skorec
Expert
Posts: 1743
yes
Real Name: Peter
Re: PCP for Piledriver .177/21gr/950FPS
«
Reply #3 on:
June 19, 2018, 01:52:02 AM »
YES I now, but .177/21gr Piledrievr has 2-3 times better BC than .22/18gr JSB Heavy and therefore are muuuuuuch better for long range shooting.
Logged
EU, Slovakia
.177 AA S510 Carbine + Delta Optical Titanium 6-24X42 AO for JSB Exact Heavy
.177 Combo (CO2 and PCP ) QB78D + Hawke Vantage 4-12x40 AO for JSB Exact Express
.22 LW/CH moded Noblesse Bullpupn+ Hawke 8-32x56 SF Half MilDot for JSB Jumbo Heavy
.177 LW/CH moded Puncher + KonusPro 6-24x44 for Monster REDESIGNED
177 Poly/NCH moded Puncher ONE-T + KonusPro 6-24x44 for 21gr Piledriver
.177 HW/NCH moded Puncher Pitbull +Hawke Sidewinder 30SF for Monster REDESIGNED+NSA18gr or Piledrivers about 950 FPS
.177 Gamo GX-40 + NikoStriling 6-24x56 for JSB Exact Heavy
spare barrels .177 HW/CH + Hatsan Hercules .177 585mmx15mm TR=18,7
nervoustrigger
GTA Senior Contributor
Posts: 8701
The Grin Reaper
Real Name: Jason
Re: PCP for Piledriver .177/21gr/950FPS
«
Reply #4 on:
June 19, 2018, 02:02:12 AM »
42fpe in .177 is a tall order. I don't have any first hand experience plumbing a .177 for that kind of propulsion but scaling some numbers, I suspect you could get there with 3000psi using "conventional" 0.140" porting (approx 80% diameter of the caliber) which is about as big as you'd want for a simple round barrel port to avoid damage to the pellet while chambering it.
If you went with 100% porting, you might only need 2000psi. That would require an oblong barrel port 0.140" x 0.065" CTC and a retractable bolt probe...and of course anything upstream should have an effective area at least as big (valve exhaust port, throat minus valve stem).
That would be a heck of an ice pick...if you can get the Piledrivers to fly straight.
Logged
MS
Conduct yourself so that when a man accuses you of something dishonorable, no one will believe him.
Barrel accurizing guide
My youtube channel
QB79 HPA conversion
2240 HPA conversion
Intro to PCP airguns
skorec
Expert
Posts: 1743
yes
Real Name: Peter
Re: PCP for Piledriver .177/21gr/950FPS
«
Reply #5 on:
June 19, 2018, 02:17:32 AM »
Thanks for dates .
YES 100% porting ( with Gunpower SSS or Puncher ONE T or Huben K1,....) is the easear way and also hummer strike r is in the barrel center line.
Logged
EU, Slovakia
.177 AA S510 Carbine + Delta Optical Titanium 6-24X42 AO for JSB Exact Heavy
.177 Combo (CO2 and PCP ) QB78D + Hawke Vantage 4-12x40 AO for JSB Exact Express
.22 LW/CH moded Noblesse Bullpupn+ Hawke 8-32x56 SF Half MilDot for JSB Jumbo Heavy
.177 LW/CH moded Puncher + KonusPro 6-24x44 for Monster REDESIGNED
177 Poly/NCH moded Puncher ONE-T + KonusPro 6-24x44 for 21gr Piledriver
.177 HW/NCH moded Puncher Pitbull +Hawke Sidewinder 30SF for Monster REDESIGNED+NSA18gr or Piledrivers about 950 FPS
.177 Gamo GX-40 + NikoStriling 6-24x56 for JSB Exact Heavy
spare barrels .177 HW/CH + Hatsan Hercules .177 585mmx15mm TR=18,7
Tonycalves
Sharp Shooter
Posts: 658
yes
Real Name: Anthony
Re: PCP for Piledriver .177/21gr/950FPS
«
Reply #6 on:
June 19, 2018, 02:51:35 PM »
https://www.gatewaytoairguns.org/GTA/index.php?topic=139474.msg1403501#msg1403501
Sweet build
Logged
NY
Print
Pages: [
1
]
Go Up
« previous
next »
GTA
»
All Springer/NP/PCP Air Gun Discussion General
»
PCP/CO2/HPA Air Gun Gates "The Darkside"
»
PCP for Piledriver .177/21gr/950FPS