Everything about FX Crown!

[HiddenTarget]

Hello guys,

Last month I bought 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 tank 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)

3- what is the best pressure that can be behind the regulator to have the best efficiency for 22 caliber and if we increase the velocity should the regulator pressure increase as well or not? Or is it the opposite? ( some experts say the best pressure for the regulator is 140 bar )

4- my gun's barrel is pellet liner 22 caliber and I always put the port behind the pellet on 22 caliber, if I put it on 25 caliber, does it damage the gun?

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,...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

 

[JoeKool]

1 & 2. Leave the CF bottle on full pressure is fine 250 bar.

3. 130 to 140 bar usually works great for .22 caliber. Mileages my vary.

4. Will not damage the gun, it allows more air to flow, may increase your velocity, but consequently expend a little more air per shot. My shot count per fill decreases as I turn the transfer port up on my Crown from (LOW) , (.177/.22), or (.25/.30) transfer port settings.

5. No, slugs would work best if a slug liner is installed and the gun properly tuned for a specific slug weight, shape, brand, etc. Using slugs in a pellet liner will not yield very good consistent accuracy. Not recommended.

6. Factory earlier generation .25 FX Crowns came with the 600mm “A” liners. I’d suggest this route, you would need to purchase the Crown barrel kit which would include the barrel sleeve & liner, the extendable shroud, and a .25 pellet probe.

7. Yes I have a .25 caliber Crown currently doing just that, shooting slugs (NSA) or pellets (JSB). My 600mm slug liner “A” stays installed at all times. But, I will add that my Crown is tuned and modified for more power for heavier ammo and slugs. Accuracy is damn good! JSB 25.39 & 33.95 grain shoot lights out for me out of the slug liner.

8. To each their own, but I have my shroud locked in place. And have a DonnyFL 1/8” moderator adapter installed in replacement of the factory FX shroud cap, using the FX addition DonnyFL moderator. It’s quiet, accurate, and I really like it. I had no issues with the extendable shroud, just personally rather a fixed shroud with a aftermarket moderator. 

9.


10. Install it correctly, notched end goes in first, fully seated, and snug. That is a question for someone else to answer, but I would uninstall the liner and try again very carefully. Make sure your barrel grub screws are snugged up well(at the breech block), air stripper under the shroud also( at the muzzle end). Plenty of YouTube videos on the correct installation of the STX liner. I also would suggest trying out indexing the liner and lots of trial and error test shooting. If accuracy improves... There you go!

11. Whatever the amount of o-rings the gun came with, leave them in and space them apart evenly. But.. Some people remove them all together. I don’t because I could literally hear a slight annoying vibration from each shot when shooting with them removed. I did not enjoy that sound.

These are just my opinions to the answers for your questions from my experiences owning a FX Crown since 2017. Hope this gives you a little direction!

Have a wonderful time with your air rifle!!!


This is my GUN 

 

[2D1C]

Very good advise JoeKool just gave you HT. Part of the fun is an adventure in learning the gun. It never ends.

JK I love the look of your Crown. +1 to you for taking the time.

Dennis

 

[Bigragu]

Have never had the desire to own or even stare at a crown for too long, but, JoeCool, I gotta say, that’s a beautiful rifle right there. Really nice.

 

[JoeKool]

Very good advise JoeKool just gave you HT. Part of the fun is an adventure in learning the gun. It never ends.

JK I love the look of your Crown. +1 to you for taking the time.

Dennis

Have never had the desire to own or even stare at a crown for too long, but, JoeCool, I gotta say, that’s a beautiful rifle right there. Really nice.

Thanks 2x

 

[stoti]

JoeKool, Like Dennis said, great advice. I don't think it could have been said any better and any more thorough! Good on ya! +1

Stoti

 

[HiddenTarget]

1 & 2. Leave the CF bottle on full pressure is fine 250 bar.

3. 130 to 140 bar usually works great for .22 caliber. Mileages my vary.

4. Will not damage the gun, it allows more air to flow, may increase your velocity, but consequently expend a little more air per shot. My shot count per fill decreases as I turn the transfer port up on my Crown from (LOW) , (.177/.22), or (.25/.30) transfer port settings.

5. No, slugs would work best if a slug liner is installed and the gun properly tuned for a specific slug weight, shape, brand, etc. Using slugs in a pellet liner will not yield very good consistent accuracy. Not recommended.

6. Factory earlier generation .25 FX Crowns came with the 600mm “A” liners. I’d suggest this route, you would need to purchase the Crown barrel kit which would include the barrel sleeve & liner, the extendable shroud, and a .25 pellet probe.

7. Yes I have a .25 caliber Crown currently doing just that, shooting slugs (NSA) or pellets (JSB). My 600mm slug liner “A” stays installed at all times. But, I will add that my Crown is tuned and modified for more power for heavier ammo and slugs. Accuracy is damn good! JSB 25.39 & 33.95 grain shoot lights out for me out of the slug liner.

8. To each their own, but I have my shroud locked in place. And have a DonnyFL 1/8” moderator adapter installed in replacement of the factory FX shroud cap, using the FX addition DonnyFL moderator. It’s quiet, accurate, and I really like it. I had no issues with the extendable shroud, just personally rather a fixed shroud with a aftermarket moderator. 

9.

10. Install it correctly, notched end goes in first, fully seated, and snug. That is a question for someone else to answer, but I would uninstall the liner and try again very carefully. Make sure your barrel grub screws are snugged up well(at the breech block), air stripper under the shroud also( at the muzzle end). Plenty of YouTube videos on the correct installation of the STX liner. I also would suggest trying out indexing the liner and lots of trial and error test shooting. If accuracy improves... There you go!

11. Whatever the amount of o-rings the gun came with, leave them in and space them apart evenly. But.. Some people remove them all together. I don’t because I could literally hear a slight annoying vibration from each shot when shooting with them removed. I did not enjoy that sound.

These are just my opinions to the answers for your questions from my experiences owning a FX Crown since 2017. Hope this gives you a little direction!

Have a wonderful time with your air rifle!!!


This is my GUN 

Hi dear Joe,

Thank you for good and complete response

+1 to you for taking the time

I've a question yet, in the first question you said leave air with max pressure in the gun, some experts say if you don't use your pcp for long time, remove the gun tank. Because high pressure for long time dameges part of pieces like regulator spring disk and ogrings and etc...! Do you think this is true? Please explain more.

Keep in mind too that I don't want to change the regulator or o-rings every year

Thank you in advance my bro

 

[Hobbyman2007]

These guns are designed to hold high pressure air . Leaving them charged while in storage will not “damage” anything . At one point or another , you will have to replace orings . That’s just the nature of PCP rifles . The quality of the air you out in the gun will have a greater affect of wear and tear than leaving it charged will. 

 

[HiddenTarget]

These guns are designed to hold high pressure air . Leaving them charged while in storage will not “damage” anything . At one point or another , you will have to replace orings . That’s just the nature of PCP rifles . The quality of the air you out in the gun will have a greater affect of wear and tear than leaving it charged will.

Yes I know, but you have to consider this point that I'm in a place where I don't have access to replace o-rings and regulator at least for a year. With this situation، is your suggestion to keep the air pressure in the gun? If I'm going to keep the air pressure in the gun for a long time, with what pressure should I do this?

Isn't gunsmith here to give me an expertise answer?

 

[Glem.Chally]

Keep it somewhere between 200 and max fill. These guns aren't that terribly prone to leaks as you'd think and can hold air for years.

As far as gunsmiths/expertise answer many people here have been into these guns for years and can completely disassemble and assemble these guns without help (joekool included). That said if you want the manufacturers recommendations email them.

 

[HiddenTarget]

Keep it somewhere between 200 and max fill. These guns aren't that terribly prone to leaks as you'd think and can hold air for years.

As far as gunsmiths/expertise answer many people here have been into these guns for years and can completely disassemble and assemble these guns without help (joekool included). That said if you want the manufacturers recommendations email them.

You're right but I didn't mean air leaks.

My question is specifically about the depreciation of the parts, such as o-rings, regulator disk spring and etc....

For example, if the air is in the gun for a long time, will parts such as the regulator disk spring and o-rings depreciates?or is it the opposite?

Dear Glem, I want to choose the condition that my gun will have the least damage, because I don't have much access to replace them with new items

That's why I told a gunsmiths/expert should answer.
Because I need an answer from someone who fully knows the inner parts of the gun.

 

[Long_Gun_Dallas]

I would think that the less the gun sees pressure, the longer seals will hold their original shape. Some of my guns have seals in them that are all sorts of deformed and squished that still work just fine . Honestly, I wouldn't be that worried about it. 

But as always, whatever helps you sleep at night. The bottles have valves, so they can be removed from the gun without losing their pressure. I dry fire mine to release pressure from the gun (although I've heard you're not supposed to) I'm still not sure if that's even true or why it would be. You can also turn the regulator screw to release pressure. Store gun with the bottle either not attached or screwed on but not enough to pressurize the gun. 

Personally, I just leave it charged. If a seal goes, I'll order in 20 of em (they cost nothing). And I'll be set to repair that seal for life. I have not had to order any seals for my crown FYI 

 

[HiddenTarget]

I would think that the less the gun sees pressure, the longer seals will hold their original shape. Some of my guns have seals in them that are all sorts of deformed and squished that still work just fine

. Honestly, I wouldn't be that worried about it. 

But as always, whatever helps you sleep at night. The bottles have valves, so they can be removed from the gun without losing their pressure. I dry fire mine to release pressure from the gun (although I've heard you're not supposed to) I'm still not sure if that's even true or why it would be. You can also turn the regulator screw to release pressure. Store gun with the bottle either not attached or screwed on but not enough to pressurize the gun. 

Personally, I just leave it charged. If a seal goes, I'll order in 20 of em (they cost nothing). And I'll be set to repair that seal for life. I have not had to order any seals for my crown FYI

Thanks so this is what you mean I can remove the bottle for long time? (because with this situation the inner parts, seals and o-rings don't deform), do you approve? 

 

[Long_Gun_Dallas]

If you so desire, that's 100% feasible. You just need to turn the regulator screw or dry fire the gun (with bottle off) to bleed pressure from the system 

 

[HiddenTarget]

If you so desire, that's 100% feasible. You just need to turn the regulator screw or dry fire the gun (with bottle off) to bleed pressure from the system

So would you recommend this(remove the bottle) based on your experience to working with FX Crown?

 

[Long_Gun_Dallas]

Only for short intervals. It's not good to leave anything sitting for too long. And the air in the tank should be dry/clean. So, I would rather leave it pressurized for long storage periods.

But as i stated earlier, I have no concern whether or not my seals fail or deform. If they do, I will fix them. Quickly and easily. 

 

[JoeKool]

A lower pressure for longer term storage would be better for o-rings to remain sealing, and keep out dust / debris.(better than no pressure) 50 bar above regulator pressure should be sufficient.
Totally degassing the gun for long-term storage is a good way to develop a leak the next time you pressurize it. Seen it happen. O-rings tend to move, shrink, silicone grease dries out, and o-rings tend lose their sealing position with no pressure holding or compressing them in the proper place.
I’ve stored my FX Crown @ full 250 bar pressure for the length of ownership (2yrs) and use it when the need arises, never had any leaks.

 

[HiddenTarget]

Only for short intervals. It's not good to leave anything sitting for too long. And the air in the tank should be dry/clean. So, I would rather leave it pressurized for long storage periods.

But as i stated earlier, I have no concern whether or not my seals fail or deform. If they do, I will fix them. Quickly and easily.

Thanks, +1 to you for taking the time

How many times often do you change the o-rings or regulator and its parts every year?

 

[Long_Gun_Dallas]

No problem

I havnt had to change any on my crown. But I've only had it for half a year. But I have put thousands of rounds thru it. High power slugs (155bar) and tons of 131 bar shooting pellets. I would expect all the seals to have a long life expectancy. I mean years. You can always order a rebuild kit (they don't cost much) so you don't have to worry about not having the seal on hand.

I have several airguns, so if I need a seal, I order that seal, but you have to order about 20 of them. (3-5$ tops) usually me ordering a seal is a result of me damaging one (fooling with things) or some modification I've made (need larger or smaller seal)

 

[HiddenTarget]

A lower pressure for longer term storage would be better for o-rings to remain sealing, and keep out dust / debris.(better than no pressure) 50 bar above regulator pressure should be sufficient.
Totally degassing the gun for long-term storage is a good way to develop a leak the next time you pressurize it. Seen it happen. O-rings tend to move, shrink, silicone grease dries out, and o-rings tend lose their sealing position with no pressure holding or compressing them in the proper place.

So do you think removing the gun bottle is absolutely wrong and will my gun damage and cost? it's true?

Please guys consider my circumstances while answering my questions, because I don't have access to replace or change anything in the gun at least for a year, so please give me the best advice for my situation