Umarex origin more power
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All Springer/NP/PCP Air Gun Discussion General
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"Bob and Lloyds Workshop"
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Rocker1
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ezman604
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amb5500c
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Umarex origin more power
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Topic: Umarex origin more power (Read 753 times))
chuckkil
Shooter
Posts: 5
yes
Real Name: Richard
Umarex origin more power
«
on:
October 15, 2021, 09:59:08 AM »
I have a umarex origin 22cal. I'm trying to max out power to shoot 25g JSB's or slugs 900 +fps. I have drilled the barrel port to 11/64 but only get 880 fps. I think I need a lighter valve spring to get more air. Any help would be appreciated.
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USA, LA, Many
scottyathome0
Plinker
Posts: 129
yes
Real Name: Scott
Re: Umarex origin more power
«
Reply #1 on:
November 05, 2021, 12:15:34 AM »
Did you drill out 11/64 from the valve all the way through to the barrel.
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USA, IL, Springfield
chuckkil
Shooter
Posts: 5
yes
Real Name: Richard
Re: Umarex origin more power
«
Reply #2 on:
November 07, 2021, 09:50:43 AM »
The port between the valve and the barrel is larger than 11/64
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Umarex origin more power