Fx Crown
- Thread starter wolfie
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First of all, I don't have secrets (check my replies), second, I don't have much time either.
I'll see if I can make some sort of tutorial, but it takes a lot of time. And it is likely that some guys will mess up their reg, because it can be a risky operation if someone doesn't know exactly what he is doing. And you'll likely need some proper tooling to make a exactly fitting washer for the reg. piston.
Please read the next post, it is a summary of what I did to fix it.
http://www.airgunnation.com/topic/fx-crown-modified-regulator/#post-267195
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Yes, I have experienced this. First in my Impact, first couple shots were always low. The Impact was great to hunt with but I could never get tight groups with it. I traded it in for a .30 Crown. When the Crown arrived the regulator gauge read 165 bar. I shot it a couple times and it came down to around 150 and was shooting 44.75''s @ 870 fps. This gun shoots way better than the Impact. I was in love for the fist two weeks. Then during a disappointing day shooting targets at 100 yards I realized while filling that the regulator was creeping up to 185 bar... so the first couple shots were always low; 745-800 fps. My regulator has settled in at 175 and drops to about 160, after a few shots. I might add that my brother has the same gun from the same batch and his regular pressure stays at 150 all the time. So naturally I think my Crown is defective. I call FX service center today-they're closed. Oh well. So I read the manual, removed the bottle, set hammer spring to minimum, fired a couple shots til regulator dumped, screwed regulator adjuster clockwise 1 turn, screwed bottle back on, backed out regulator (counter clockwise ) til gauge read 148, ten shots at around 870 fps so far so good. Then I filled to 230 bar that was 2 hours ago and regulator is holding steady at 150 bar. I hope this fixes it. You might want to try this with yours. Good luck.
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This kind of confirms my suspicion that the belleville washers get crushed at pressures above 150 bar. A flattened out belleville washer is running out of travel, hence causing the regulator to creep.
Above 150 bar ==> creep.
Below 150 bar ==> stable.
This could also be the main reason that FX states 150 bar as max. pressure for the Impact and Crown.
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I have a .30. My reg pressure was set by Utah Air Guns at slightly under 150. I have not noticed any creep. The more I shoot it the better it shoots. I think the regulator is broken in and I am going to leave well enough alone - I am shooting the JSB 44.75 and am getting 855 to 860 with close to 40 shots before it falls off the reg. I am pretty happy with that.
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I find that mine creeps a little as well. It’s set at just over 130 but after a day or two it’s closer to 140. Once it’s fired (dry or with pellet) it comes back down to 130 and then stays there in the short term but then creeps up again after a day or two. I’ve not found that it continues to creep up and up though, it gets to 140 and seems to stop there.
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Do you think the regulators may creep a little bit until they are broken in? I always heard that you need to run one or two tins of pellets through them before they settle in.
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Hi Gijs. Great to get your experienced opinion.
Im wondering if because the sealing surface of the regulator changes when it adjusted creep can just be a little hit or miss.
My reg (in Crown) was creeping 5+ bar with the reg set at about 125 bar on the gauge. I degassed and adjusted it to 120bar and now it is much more stable.
I know if everything is square and correct adjusting the reg shouldn’t make a difference to creep but in my experience it can. It’s just a bit random
Michael
Im wondering if because the sealing surface of the regulator changes when it adjusted creep can just be a little hit or miss.
My reg (in Crown) was creeping 5+ bar with the reg set at about 125 bar on the gauge. I degassed and adjusted it to 120bar and now it is much more stable.
I know if everything is square and correct adjusting the reg shouldn’t make a difference to creep but in my experience it can. It’s just a bit random
Michael
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This is also why I don’t think a shot string over a chronograph always demonstrates how consistent a regulator is. Because it’s nearly always done in a rhythm so the reg recharge is consistent.
If we did 10 shots 5min break ect....
If we did 10 shots 5min break ect....
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Hey Michael, it's true that the sealing surface of a reg. needs to break in. There are always tiny machining marks in the Delrin reg. piston which need to be "ironed out" first to give the best sealing performance. That happens during use, because the piston is moving with every shot.
In most of the cases, it will get better in time.
B.t.w, just a tip, I also adjust the reg. pressure down under pressure with a little trick.
When you dryfire a shot, the gauge of the regulator gauge takes a big dip in pressure.
This dip normally takes about 1 second before the pressure settles again.
In this second, the regulator piston is not making contact with the adjuster screw.
So, within this second, I immediately turn in the reg adjuster screw about 1/8th of a turn.
Now the regulated pressure will be down, and can be worked up to the desired pressure again.
Works perfect and saves a lot of hassle (degassing)
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AirSupply you are right, a shot string say nothing, I am Canadian and I have to go at a shooting range and that the LAW, at the shooting range there is no rhythm there is always something to disturb you . Target time, fill up the magasine, people who want to show you something and the worse some gust of wind. So making a nice target at 100 yards is the reality.
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Thanks for the tip Gijs. Save some time and air. I am enjoying shooting the Crown with the smooth x barrel. I have to say if you take the wind out of the equation it is as accurate with normal Kings as the Impact with LW polygon barrel shooting King Heavies.
It doesn’t take much of a breeze to swing the advantage back to the Heavies though.
I didn’t think the normal Kings where capable of that sort of accuracy. It did surprise me.
Personally I can’t get the Heavies to shoot as well out of the smooth x barrel at 100y. I’m waiting for a quicker twist liner to make them work.
Saw the pictures of your shroud. Looks great. Do let us know how it shoots.
Hi Snowbird. Sounds busy at your range! Is it a Crown your shooting? Are you getting good groups at 100y?
It doesn’t take much of a breeze to swing the advantage back to the Heavies though.
I didn’t think the normal Kings where capable of that sort of accuracy. It did surprise me.
Personally I can’t get the Heavies to shoot as well out of the smooth x barrel at 100y. I’m waiting for a quicker twist liner to make them work.
Saw the pictures of your shroud. Looks great. Do let us know how it shoots.
Hi Snowbird. Sounds busy at your range! Is it a Crown your shooting? Are you getting good groups at 100y?
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I think to high reg setting makes the hammer spring not able to open the valve enough....I could be wrong.
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Hi AirSupply, I am shooting a r500 with a creep regulator, I alway have to shoot 2 to 3 pellets before it settle down and after that if I pull the trigger at 15 seconds intervales it shoot realy good. I bought a Huma regulator and as soon as go back home from Florida I will proceed at the replacement. I was looking for a crown .30 but I back off and wait .
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I know how you feel. I got rid of my impact for the same reason. After I adjusted my regulator pressure down to 148 bar on Monday it holds better but still creeps up to 160 after 48 hours. It would be great if FX or Ernest would chime in on this topic. The Crown is a very good rifle. To me, this is its only shortcoming. FX should be concerned about this if they really care about "The FX owners experience". Consistency is what I want out of the Crown. What good is the adjustability without it. FX USA I hope you read this forum and address this concern...it's costing you money in lost sales, as Snowbird stated he wants a Crown .30 but he's going to wait.
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The day fx is going to sale a repair kit easy to order on the web, I will buy a crown, I anderstand that every regulator will creep one day but not so soon.
But I want a shoot .30 this summer , so I call my fx retailer and he put aside a fx boss for me. I already receive a second huma regulator for the boss + a repair kit. I want to have fun this summer.
But I want a shoot .30 this summer , so I call my fx retailer and he put aside a fx boss for me. I already receive a second huma regulator for the boss + a repair kit. I want to have fun this summer.
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