DIY Bullpup not enough FPS !!!

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srkhan

Post subject: DIY Bullpup not enough FPS !!!

Posted: Mon Oct 08, 2018 9:21 am

Joined: Fri Mar 05, 2010 6:52 am
Posts: 11
Location: Bangladesh

it tooks so long to complete this bullpup with my limitations. and finally it cant penetrate a .5" Particle board
from muzzle with 150Bar.

19.5" RWS barrel .22cal

4.3" Transfer port (barrel too)

any suggestion and requirement you need to advice in my project ?

how can i archived 900 fps with 16 grain pellet with 150bar ?

Attachments:

Valve inside.JPG [ 129.15 KiB | Viewed 1123 times ]

pcp (2).jpg [ 8.01 KiB | Viewed 1123 times ]

pcp (1).jpg [ 71.48 KiB | Viewed 1123 times ]

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RWS Diana 350 Magnum Classic .22 with Hawke Airmax EV 4-12x50 AO

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rsterne

Post subject: Re: DIY Bullpup not enough FPS !!!

Posted: Mon Oct 08, 2018 10:18 am

Joined: Sat Nov 03, 2007 4:19 pm
Posts: 9518
Location: Coalmont BC

Have you tried a LOWER pressure?.... Let the air pressure in the reservoir drop below 150 bar and see if the velocity increases.... If it does, then you need a stronger hammer strike to open the valve fully at 150 bar.... stronger hammer spring and/or more preload....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal; Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!

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