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PostPosted: Fri Apr 10, 2020 4:13 pm 
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Joined: Wed Apr 08, 2020 5:40 am
Posts: 6
Location: Earth
Hello guys,

I have a Crown .22 caliber and I have some questions about using and maintenance. I usually use this gun every 10 days so it means the gun is not used for 27 days every month. These are my questions:

1- when I don't use the gun should I remove the bottle or let the air stay behind the regulator?

2- After finishing my shooting what pressure should the gun have until the next time for shooting? (The lowest pressure that has the lowest amount of damage to the tank or other parts like o-rings)

3- what is the best pressure that can be behind the regulator to have the best efficiency for .22 caliber (Especially JSB Exact Heavy 18.13 gr) and if we increase the velocity should the regulator pressure increase as well or not? Or is it the opposite?

4- Following the previous question what is the optimum hammer spring tension length for the best speed and efficiency ?

5- can I have slug shooting with my gun (Pellet liner) and have an accurate shooting? Does you suggest this or not?

6- I would like to buy a liner .25 caliber What liner with what length (500-600-700 mm or… ) and what code (a or b) and slug or pellet do you suggest? (I have enough budget only for one liner and I would like to have long range shooting.)

7- Can I shoot pellet with slug liner and have accuracy?

8- what's your idea about harmony in shooting and the accuracy of FX crown without shroud? Do you suggest something better like silencer or muzzle break,moderator,…instead of default shroud? (Because each time I remove the shroud I get better groups and as a result better accuracy)

9- My gun has default shroud of the company, because the shroud is like telescope so do you think it's better to have the shroud open or closed?

10- I removed the liner of my gun for cleaning and then I attached it but I didn't have the accuracy that I had in the past. I think the liner is not in the right place. This question is about liner indexing, so in your opinion what is the exact place for liner ( What angle) to have the best accuracy?

11- And the last question is that in your opinion for having the best barrel vibration control and the best accuracy with how many o-rings and in what points should I get the liner? (My liner is FX crown 22 caliber(500mm) and there are 2 o-rings around the liner)


Thank you in advance.

This is my GUN 8)


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Iman JK
FX Crown Cal .22 Synthetic
Hawke Sidewinder 8-32x56 Riflescope
Vortex Razor HD 4000 Rangefinder
Zeiss Conquest HD 10x42 Binocular
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PostPosted: Fri Apr 10, 2020 4:16 pm 
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Joined: Wed Jan 05, 2011 12:35 pm
Posts: 6660
Location: P.G. B.C.
PCP guns are supposed to be stored with 'some' air pressure in them. I do not think the amount is critical.
I like to store my guns fully charged. That way, I can "see" if they are holding pressure. Good or bad, I don't
know.

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Daryl


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PostPosted: Fri Apr 10, 2020 4:35 pm 
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Joined: Wed Apr 08, 2020 5:40 am
Posts: 6
Location: Earth
Daryl wrote:
PCP guns are supposed to be stored with 'some' air pressure in them. I do not think the amount is critical.
I like to store my guns fully charged. That way, I can "see" if they are holding pressure. Good or bad, I don't
know.


Hi my friend,
Some people believe that the pcp guns should be kept at a pressure higher than the regulator pressure! I don't know the reason!
In your opinion Is there any problem if the rest pressure is lower than the regulator pressure?! :roll:

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Iman JK
FX Crown Cal .22 Synthetic
Hawke Sidewinder 8-32x56 Riflescope
Vortex Razor HD 4000 Rangefinder
Zeiss Conquest HD 10x42 Binocular


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PostPosted: Fri Apr 10, 2020 4:55 pm 
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Joined: Thu Jun 28, 2018 9:31 am
Posts: 95
Location: CALGARY
tHIS MAYBE OF HELP TO YOU YOU TUBE CHANNEL AIRGUN 101 THERE ARE A NUMBER OF VIDEOS FROM VARIOUS SHOOTERS,WHICH USE THE CROWN..78 WHISKEY COMES TO MIND UTAH AIRGUNS AIRGUN GEAR SHOW REVIEWS IT


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PostPosted: Sat Apr 11, 2020 4:54 pm 
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Joined: Wed Jan 05, 2011 12:35 pm
Posts: 6660
Location: P.G. B.C.
HiddenTarget wrote:
Daryl wrote:
PCP guns are supposed to be stored with 'some' air pressure in them. I do not think the amount is critical.
I like to store my guns fully charged. That way, I can "see" if they are holding pressure. Good or bad, I don't
know.


Hi my friend,
Some people believe that the pcp guns should be kept at a pressure higher than the regulator pressure! I don't know the reason!
In your opinion Is there any problem if the rest pressure is lower than the regulator pressure?! :roll:


Storing a gun with pressure in the tank stresses the seals. Seems "people" believe this is best.
If stored below regulator pressure, the O rings or seals in the regulator will not be under stress. Perhaps that is why storing over
regulator pressure was recommended.

_________________
Best Wishes
Daryl


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PostPosted: Sun Apr 12, 2020 8:01 am 
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Joined: Wed Apr 08, 2020 5:40 am
Posts: 6
Location: Earth
Daryl wrote:
HiddenTarget wrote:
Daryl wrote:
PCP guns are supposed to be stored with 'some' air pressure in them. I do not think the amount is critical.
I like to store my guns fully charged. That way, I can "see" if they are holding pressure. Good or bad, I don't
know.


Hi my friend,
Some people believe that the pcp guns should be kept at a pressure higher than the regulator pressure! I don't know the reason!
In your opinion Is there any problem if the rest pressure is lower than the regulator pressure?! :roll:


Storing a gun with pressure in the tank stresses the seals. Seems "people" believe this is best.
If stored below regulator pressure, the O rings or seals in the regulator will not be under stress. Perhaps that is why storing over
regulator pressure was recommended.


Yes it's true, continuous air pressure causes the o-rings to fit, but what about spring disks(Washers)?
I heard somewhere the regulator spring disks deformed under high continuous pressure so lose its performance.

_________________
Iman JK
FX Crown Cal .22 Synthetic
Hawke Sidewinder 8-32x56 Riflescope
Vortex Razor HD 4000 Rangefinder
Zeiss Conquest HD 10x42 Binocular


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PostPosted: Sun Apr 12, 2020 10:53 am 
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Joined: Wed Jan 05, 2011 12:35 pm
Posts: 6660
Location: P.G. B.C.
I do not know about the regulator's belville washers losing their spring from constant pressure. Perhaps Bsterne will chime in.
Compressed air tanks with a 3,000psi regulator have constant high pressure in them - for years.

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Daryl


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PostPosted: Sun Apr 12, 2020 7:22 pm 
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Joined: Tue Oct 07, 2008 10:40 pm
Posts: 879
Location: ontario, canada
Hi, is your barrel the Twist X barrel? If it is you can shoot slugs with it.
If you’re thinking to get a .25cal you need more than the liner you need a barrel kit.
You said that your barrel is telescopic......you’re not in Canada are you, those are illegal here along with silencers...etc.
As far as pressure I’ve been told by agent to keep pressure in the gun while storing it.
If I were to get a barrel lit I would most likely opt for the 700mil if you’re shooting targets if you’re hunting in the Bush prob 600mil.

Where did you buy the crown from, I would think most of these questions may best be answered where you bought the gun from.

Take care

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HW97
FX Impact


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