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Old 01-09-2017, 06:02 PM   #1 (permalink)
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PRP Ideal HPA Pressure?

Pretty sure only a handful of people might know, but i figured i'd throw it out there and see if anyone has some advice

Last summer I brought my PRP out and was ready to rock and roll all day with it. However, after I started chrono'ing with it I got very frustrated because I couldn't get the marker to shoot above 260 no matter what I tried.

I was using a Myth regged HPA bottle with, I think, an output of about 650-600psi. I had my JJ barrel with a back at about .681 and it wasn't underboring a whole heck of a lot, but it definitely wasn't an overbore. The temp was around 80F and the paint was fresh.

So yeah, I used the velocity adjuster and turned it up and down and never got above 260. It seemed the marker was the happiest about 230 fps.

At this point I'm thinking about getting either an Ninja adjustable or a Ninja SHP reg. Do you guys think I need 900psi to get this marker to run normally or is a regular Ninja adjustable that can out put 800psi good enough?

Any help is appreciated.
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Old 01-09-2017, 06:06 PM   #2 (permalink)
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Some had issues with springs, Contact ICD
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Old 01-09-2017, 06:35 PM   #3 (permalink)
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Some had issues with springs, Contact ICD
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Old 05-19-2017, 01:23 PM   #4 (permalink)
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Krupa, way too late, but i just ran across this.

The PRP was optimized for low pressure HPA, so try running 400-450 and you'll see dramatic improvement. To go to the higher side will only bring more frustration as the valve will slam shut faster netting less velocity.

Sorry for not seeing this, but if there are any more issues, call me at ICD!
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Old 05-19-2017, 02:00 PM   #5 (permalink)
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Krupa, way too late, but i just ran across this.

The PRP was optimized for low pressure HPA, so try running 400-450 and you'll see dramatic improvement. To go to the higher side will only bring more frustration as the valve will slam shut faster netting less velocity.

Sorry for not seeing this, but if there are any more issues, call me at ICD!
That's an important and interesting factoid. I don't see it in the manual. Being CO2 capable, you expect it to be a little closer to 800 psi. 400-450 is great though.
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Old 05-19-2017, 03:14 PM   #6 (permalink)
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That's an important and interesting factoid. I don't see it in the manual. Being CO2 capable, you expect it to be a little closer to 800 psi. 400-450 is great though.
He offers a CO2 valve for higher pressures, if you ask nicely when you order he'd probably switch it out for you.


Any who, the only problem I've had with my PRP is chopping because of small paint. And I got my hands on some sizers for cheap, just haven't had the time to test if that'll fix it or if a different detent will.
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Old 05-19-2017, 04:13 PM   #7 (permalink)
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He will switch it out when you order, and it's actually the power tube, so you should be able to just swap them back and forth without messing with springs.
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Old 12-15-2018, 11:11 PM   #8 (permalink)
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Wondering if anyone else came across this issue since first posted and had a solution.

I am having similar problems except at 450 reg setup I get massive leak down the barrel when cocking the pump. Acts as if I don't have enough pressure for the valve. At 650 the problem is gone but now getting over 260fps doesn't seem possible same as the issue posted from original post. There isn't any mention of tank regulator settings being a requirement so I wish that would have been mentioned in the manual.

*UPDATE*
The PRP is optimized for around 400-450psi. That's from Indian Creek directly but should run fine with any reg in the 450-700psi output pressure range.

Last edited by emo.83; 01-16-2019 at 09:39 PM.
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