Snowpeak FPS Problem

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?
 
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?
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
 
Before zeroing the gun
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.
 
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.
 
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.
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.
 
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.
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.