Snowpeak FPS Problem

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You shouldn't have to fire anything to get consistent fps.
You could tell us how did You determine the regulator pressure? As far as I know there is no plenum gauge on P15. Not on mine at least.
I would also suggest buying a real plenum like the one from Huma. It's not expensive and should make a world of difference. I say this because 130bar on a P15 is not exactly back yard plinking anymore is it?

Can You give us more information about symptoms and what You have done so far?
 
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Will74 said:
You shouldn't have to fire anything to get consistent fps.
You could tell us how did You determine the regulator pressure? As far as I know there is no plenum gauge on P15. Not on mine at least.
I would also suggest buying a real plenum like the one from Huma. It's not expensive and should make a world of difference. I say this because 130bar on a P15 is not exactly back yard plinking anymore is it?

Can You give us more information about symptoms and what You have done so far?
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Thanks Will74
I have a regulator tester to set regulator pressure.
Not more information.
I just increase power to get more fps because it was giving me 800fps at 120bar reg pressure that was not good for JSB 18gns
 
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cjvprecision said:
Before zeroing the gun
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One of the idiosyncrasies of some airguns is having to take a few shots for gun to "settle down". Some platforms are OK from the start but, again, some people have expectations of airguns behaving more like pb's. If someone NEEDS a gun to perform from the very 1st shot then they should find & get guns that WILL do that. They are available.
 
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You need to measure the velocity where you are and then turn the hammer spring up half a turn and measure again. Keep turning it up until the velocity stops increasing. The turn the hammer spring down until the velocity is about 5% less than the peak. If the velocity does not increase when you increase the hammer spring then you decrease the hammer spring until velocity decreases. You want the hammer spring a little under what gives peak velocity.

130bar is not too high a reg pressure. I have my p35-25 at least that high. The hammer spring gets too weak to open the valve a little under 150 bar. I think it would be safe to try 140 if you need it. My P35-22 pushes 21 grain H&N baracudas over 800 fps with a reg pressure around 135.
 
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Gerry52 said:
One of the idiosyncrasies of some airguns is having to take a few shots for gun to "settle down". Some platforms are OK from the start but, again, some people have expectations of airguns behaving more like pb's. If someone NEEDS a gun to perform from the very 1st shot then they should find & get guns that WILL do that. They are available.
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Which ones are known to preform from the first shot? I have a limited knowledge of airguns. It was my understanding that inconsistencies with velocity is typically a tuning issue. Is this not the case?

I have a FX crown that the first shot was way low velocity. Then within a few shots it would level out. Increasing the hammer spring fixed the problem.
 
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forrest342 said:
Which ones are known to preform from the first shot? I have a limited knowledge of airguns. It was my understanding that inconsistencies with velocity is typically a tuning issue. Is this not the case?

I have a FX crown that the first shot was way low velocity. Then within a few shots it would level out. Increasing the hammer spring fixed the problem.
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My FX Boss (.30), Royale 500 (.25) & Bobcat (.22) are examples. I hear that Taipan Vets & Daystate Huntsman are others. SOOB (straight out of box) accurate shooters. The ONLY time I experience the "settling in" is after cleaning barrels (MAYBE once per year) & they need re-leading but that's normal & not quite the same thing.
 
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I have had to increase the hammer spring a little from a minus 5% velocity setting to get the first shot velocity consistent with subsequent shots in my P35s. Sometimes I do not go as low as -5% if the accuracy a bit higher looks better. My Caiman had a low first shot too for awhile but I was more than 5% below the peak. I normally shoot 3 to 5 shot groups as I go down to get a better idea of the velocity and to check accuracy.
 
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