Atomic XR Carbine

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rcdyna

rcdyna

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Sep 9, 2017
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Hi, need some help from owners of a Atomic XR or Ranger. I purchased a new Atomic carbine from AOA. The gun arrived with air in it and shoots well. I have pumped the gun to 250 bar and it has held pressure for the three days I tested it. However if I shoot the gun down to 100 bar the gun will leak down to 0 overnight. AOA says that maybe once the gun goes below the regulated pressure it will leak down. I need to know if this is true? Does your Atomic or PCP in general leak down once it has reached the regulated pressure. I do not want to hand pump this gun every day from 0 to 250 bar. And somedays after shooting to 100 bar, I dont feel like pumping back up to 250. I have never had a regulated PCP before, but my non reg. Marauder doesn't leak at any pressure. I have emailed Brocock but have not heard back from them yet. Doesn't seem to make sense, but as I said seems to hold fine at 250 bar.
 
Yes, it just depends on the valve inside of the air cylinder.
I have a Steyr LP50 target pistol. It's great fun to shoot. It's basically a "semi-automatic. It's got a 5 round stick magazine. You just keep shooting until the magazine is empty.
So you can imagine the first time that I put a couple of magazines through it, then I hear the dreaded hiss...of the remaining air pressure dumping, because I shot the gun into the regulators minimum pressure, and it dumped the rest...sound familiar ?

I've done it more than once !

rc - Stop shooting at 125 bar, and refill. See if that works to keep the cylinder full. Seems most, or at least many...guns have their regulators set to 125 bar.

Mike
 
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rcdyna said:
Hi, need some help from owners of an Atomic XR or Ranger. I purchased a new Atomic carbine from AOA. The gun arrived with air in it and shoots well. I have pumped the gun to 250 bar and it has held pressure for the three days I tested it. However if I shoot the gun down to 100 bar the gun will leak down to 0 overnight. AOA says that maybe once the gun goes below the regulated pressure it will leak down. I need to know if this is true? Does your Atomic or PCP in general leak down once it has reached the regulated pressure. I do not want to hand pump this gun every day from 0 to 250 bar. And somedays after shooting to 100 bar, I dont feel like pumping back up to 250. I have never had a regulated PCP before, but my non reg. Marauder doesn't leak at any pressure. I have emailed Brocock but have not heard back from them yet. Doesn't seem to make sense, but as I said seems to hold fine at 250 bar.
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I shoot my Atomic XR down to 100-110 BAR, but have always aired back up to 250 BAR. It shouldn’t be leaking down to zero. I suspect the Oring at the inlet valve. Can you pump it up to 250 BAR and let it sit a few days to see if it’s leaking down. Or you could use some “leak detector“ apply with a dropper in the fill port or gauge. If you see by bubbles, there’s your answer. Otherwise AOA should help you out.

F6A8D05B-1BCC-4ABF-98E8-9F18E7DA9656.jpeg
 
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Newbie here. After one fill with a Hill hand pump and two with an Omega tank/HP3 valve my two week old Atomic XR loses pressure. The first days it was left full overnight without loss, but yesterday and today it goes from 250 Barr down to one hundred in a few hours. AOA tech says to put some Windex in the fill port valve and watch for bubbles. Does he mean remove the protective collar, stand the gun on the stock and place a few drops inside the opening of the fill valve in the back of the fill port?
 
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eravelo said:
Newbie here. After one fill with a Hill hand pump and two with an Omega tank/HP3 valve my two week old Atomic XR loses pressure. The first days it was left full overnight without loss, but yesterday and today it goes from 250 Barr down to one hundred in a few hours. AOA tech says to put some Windex in the fill port valve and watch for bubbles. Does he mean remove the protective collar, stand the gun on the stock and place a few drops inside the opening of the fill valve in the back of the fill port?
Click to expand...
Yes, I believe that is what AOA is suggesting. The leak detection fluid is better, because it clings to the surfaces and bubbles up nicely if there is a leak. You might also apply some to the threads around the pressure gauge. It’s unfortunate that you are experiencing this. It most likely is the Oring at the inlet valve. A simple fix, but not one you should have so early in ownership. My Atomic XR is coming up on a year of ownership in March. It has been rock solid. Don’t give up on the platform, they are awesome little beasties. Please keep us posted on your results. Good luck!
 
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L.Leon said:
Yes, I believe that is what AOA is suggesting. The leak detection fluid is better, because it clings to the surfaces and bubbles up nicely if there is a leak. You might also apply some to the threads around the pressure gauge. It’s unfortunate that you are experiencing this. It most likely is the Oring at the inlet valve. A simple fix, but not one you should have so early in ownership. My Atomic XR is coming up on a year of ownership in March. It has been rock solid. Don’t give up on the platform, they are awesome little beasties. Please keep us posted on your results. Good luck!
Click to expand...
Thanks for your quick and kind response.
I saw the YouTube video from AOA on the Brocock Compatto Inlet Valve Repair. If that is my problem I can easily send the entire valve assembly and let AOA change the O ring, as that seems more than what I can do.
I have accessorized my Atomic, and it is a great accurate shooter. Hope to eradicate the iguanas that eat the wife's orchids and my guavas!
 
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Well, I found that Leak Detecting Solution and applied it to the inlet after filling to 250 Barr. No bubbles ! Waited two hours checking every five, no bubbles AND THE PRESSURE HELD! Four hours latter it is still OK. I have the action closed on an empty chamber. Don't remember how I had it when I detected the "problem"; if it holds pressure overnight will load one in the chamber and see if it makes a difference.
On another topic I have noticed that when I stop insufflating and open the bleed valve the pressure indicated on the Atomic's gauge drops about 5 Barr.
Is that normal?
 
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eravelo said:
Well, I found that Leak Detecting Solution and applied it to the inlet after filling to 250 Barr. No bubbles ! Waited two hours checking every five, no bubbles AND THE PRESSURE HELD! Four hours latter it is still OK. I have the action closed on an empty chamber. Don't remember how I had it when I detected the "problem"; if it holds pressure overnight will load one in the chamber and see if it makes a difference.
On another topic I have noticed that when I stop insufflating and open the bleed valve the pressure indicated on the Atomic's gauge drops about 5 Barr.
Is that normal?
Click to expand...
Yes, it will drop in pressure and be reflected on your gauge.… a few extra strokes past 250 BAR and when you bleed the pump? The Atomic gauge should read 250 BAR. Keep us posted.
 
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eravelo said:
Well, I found that Leak Detecting Solution and applied it to the inlet after filling to 250 Barr. No bubbles ! Waited two hours checking every five, no bubbles AND THE PRESSURE HELD! Four hours latter it is still OK. I have the action closed on an empty chamber. Don't remember how I had it when I detected the "problem"; if it holds pressure overnight will load one in the chamber and see if it makes a difference.
On another topic I have noticed that when I stop insufflating and open the bleed valve the pressure indicated on the Atomic's gauge drops about 5 Barr.
Is that normal?
Click to expand...
Nothing says you must fill to 250 bar. I pump mine up to a little under 250 bar (perhaps 240 bar). But your point is still valid. By the way, it has a floating hammer. I found out the hard way if you point the pistol muzzle down toward the ground so the hammer hits the valve, it will bleed the air out of the tank. You'd have to do that hard tho, so it makes a thump. Just keep muzzle up or level.
 
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Good news!
My initial pressure yesterday was 240 after filling the gun and leaving it outside @~80deg F
14 h later inside my AC house at 70deg F it read "232" and 12h after that it is still 232. So no appreciable leak in 28h.
I have cocked the gun four hours ago and there has been no change.
I surmise some debris in the filling valve O-ring held it open a couple of days ago as it lost 100 Barr pressure in two hours, all the way down to 50 Barr in 9 hours.
Happy!
 
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eravelo said:
Last updateon the technical issue~resolved. Three days ago I left it cocked & loaded, and the pressure has held perfectly. Fired off one shot three hours ago and in the Florida heat it registers as it did six days ago, 240 Barr.
Next update will be a photo of the guava-thieving iguanas!
Click to expand...
It’s common for pcp’s to bleed off if you get too far below reg pressure. Just cock and refill - all good.
 
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