FX Crown help

Jump to latest Follow Reply
K

kk4iz

Member
Oct 17, 2015
322
2
Alabama
Ok 
First thing there is nothing in the manual on the Crown, just generic info.
My regulator is showing 170 bar?????. We called and was told gauge was off, they are set with electronic gauge to 125 bar before shipping.Why was it not replace before shipping. They are sending a new one out to me. Manual says the fill gauge is not accurate just something to go by to use your tank gauge.You can not set the regulator with it I don't. Thank goodness for the JB value. I thank you are suppose to take the bottle off and fire the gun to get all the air out before lowering the reg???????????? The manual says not to fire gun below 100 bar????
Someone please help me out here on adjusting the Crown. Value adjust is straight forward just 3 setting also the hammer adjust looks easy. Just don't want to mess up. My FX Wild Cat is just load and shoot. I have done a lot of up grades to my Marauder to improve it. So working on PCP and powder burner are no problem to me. Just need to know a little more about the Crown
 
To set the reg, you really need a good digital manometer as none of the small gauges are very accurate. According to everything I have heard, the crown factory setting is at 125 bar, everyone has a 1:30 twist rate barrel, and that configuration shoots best with the 25.4g jsb at around 890 fps.

Remember when you change the regulator, take the tank off and fire the gun empty. That is the instructions from all sources and its been okay for me so far.
...same as above when reducing regulator pressure.

If you are new to these types of guns, leave the regulator alone until you get a little more confortable with the other adjustments.

The 1-2-3 know is the aperture, and the hammer spring adjustment is toward the back. There is also an allen screw on the hammer spring that you can increase and decrease the power of the rifle. you will need a very small allen and it is located on the end of the hammer spring in front of the knob.

I've got my crown in and I'm working the bugs out of mine as well.

I have an impact and a boss and am used to 6-10 fps differentials in a 20 shot string. I'm getting around at best 16 and as much as 24 fps differential between highest and lowest velocities per 20 shot string from a 250 bar fill.

Still working on a good answer to that one...

 
Upvote 0
Just filled my Crown bottle to 240 bar and the FX was showing is showing 240 bar after setting an hour. It was showing 245 bar after filling real slow and do mean real slow. Gauge needle was barely moving.
We are going to put my scope on the Crown today and shoot a couple mags across my chronograph to check FPS also to see if my regulator pressure drop. if it don't we will swap the gauges.
 
Upvote 0
My Crown gauge is close to my two glycerin filled service gauges on my 6k nitrogen bottle and my great white as for reg gauge it's my reference to adjust even if it is off some high or low. My number on reg for me is 138 bar. Maybe it's off some but that is my reference number. I zeroed gun in rain here but that is it for me checking real accuracy today.
 
Upvote 0
What are you guys seeing for for Extreme spread and Standard Deviation on your crowns? I'm fighting vertical groups with Extreme spread at 21 and SD at 5. Filled to 240, Reg set at factory 125 bar, shooting 25.4 jsb at average velocity of 890. This is the way my gun came from the factory. My test sheet shows ES at 11 but I've not been able to duplicate that once.
 
Upvote 0
Did you move the reg or just the hammer spring? out of the box, mine will only move the 34s at 790. I tightened the hammerspring up to get them moving at 830 fps, but as you can imagine, that make the vertical grouping worse at 100 yards. ...bigger arc, exponentially bigger variance at distance. At 50 yards, the gun is a laser beam but EBR is not at 50 yards...
 
Upvote 0
I recently bought this rifle, the rifle is new from the store, but it lay without air for a long time. When I wanted to fill with air, the rifle leak air through the regulator. When I opened the regulator, I saw that all the silicone grease had dried up and when I removed the o rins, they broke and fell like plastic. I was shocked. Then I changed o'rings. After the regulator was adjusted to 130 bar and the fill rifle to 220 bar. I fired several shots, checked the regulator, worked well, all shots were at 130 bar. Then he lowered the bottle pressure to 130 bar and put it down for further observation. I checked the pressure every day, it stood unchanged for 5 days, but yesterday the pressure dropped to 115 bar. This is my first time getting acquainted with this rifle, please tell me where there may be weak o'rings.
 
Upvote 0
Just got my Crown MK2 .30. Been a real learning process on getting harmonically tuned. Watch several you tube videos to gain basics. Shooting 44.75 JSB at 930 FPS with standard deviation at 2.9 for 13 shots. Need to go through process of taking apart rifle and turning hammer spring screw all way in then start chrongraphing all your shots. Turning screw out 1 turn at a time. Mine takes 9 turns out for best results. Keep shooting and watching chronograph, when shows steady FPS shoot until starts dropping off. Turn screw back and shoot until remains close FPS. Takes time and patience. You will get there. Each pellet or slug requires same procedure. 
 
Upvote 0
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu