Posted 14 August 2009 - 04:19 PM
That isn't my gun, but it's leaking from a hole in the body right under the hump which is right under the thumb screw for the barrel clamp. From what I understand there is a valve there to vent overpressure. My problem is, I'm out of air but will be going to the field tomorrow, and need to know how to fix it when I get there. I want to know what to set the screw to adjust that at, along with the pressure screw for the stabilizer, and then how to chrono the gun. Any and all info would be helpful thanks.
Posted 14 August 2009 - 05:56 PM
As for chronoing there are a few different ways, Legato could probably fil you in better.
What I do (as a clean start such as after a complete break down/rebuild.
RVA 2 turns in from flush with the back of the endcap.
Start with regs closed
Turn main reg to 300 (2k so you may want 400ish)
Hold trigger turn lpr until bolt is flush with back of marker and/or hammer latches on sear then turn 1/4-1/3 turn more. Pushing forward on the p-block should be a bit firm but still movable/squishy
Then bring the main reg up until I'm shooting at @ 260-270fps normally reg reads somewhere around 330-340.
Normally I don't need to touch it for quite a while.
Other start at a certain pressure then use the rva to try to reach the correct velocity.
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Posted 14 August 2009 - 10:42 PM
As for the Stab setting....If you don't have a gauge don't mess with it. Just use the RVA on the bottom tube. Once you get a stab...i want to say start at 400 or 500 psi. I forget which. Pre 2k blazers ran at a higher psi, 400-500 or 500-600 psi. I forget which. A quick trip to their website can confirm one or the other.
You can take the time to sweetspot the reg if you want, will take 10 min and a few hundred rounds. But mostly PPS just recomends to set the reg in the general area and use the RVA from then on. If you want a procedure in sweet spotting the reg, so it's most effecient, let me know..i can tell you.. But it will just take you some time at the field. Just understand most effecient doesn't neccessarily mean quietest.
edit to sweetspot the reg, ,turn the RVA in 2 turns like MT said, then lower the reg til it stops working and is at zero, counter clockwise turning. Now slowly raise the pressure of the reg, turn the allen wrench clockwise. 1/4 turn at a time. Fire 3-5 shots to balance the reg out, then chrono...Keep raising the reg pressure, fire the 3-5 shots to balance, then chrono until your FPS starts dropping. As in you were shooting 300 fps, then you turned 1/4 turn more and now you are shooting 280 fps. Once the FPS starts dropping, turn the reg back to where it was. That is your sweet spot. That is the most effecient your marker can get. Do not adjust it any higher. Now use thte RVA to set your FPS from then on. DO NOT touch the main Stab. Also you MUST fire the 3-5 shots in between adjustments to give the reg time to stabilize...those first 3-5 shots will be all over the place, after that it they will remain consistent
When raising the Pressure, don't worry about how hot you are shooting. If you are over 300 FPS while doing this, so what...you willl lower it later once you find the most effecient spot. Like i said, the RVA will be your main velocityguide from then on out. Adjust the LPR also once you have finished messing with the main reg, as the LPR settings could be different. LPR does not affect velocity...just how hard the marker recocks. If you ned any help or explanation just ask
This post has been edited by Legato: 14 August 2009 - 10:49 PM
Posted 15 August 2009 - 08:37 AM
Posted 15 August 2009 - 05:55 PM
Posted 15 August 2009 - 11:52 PM
YOu adjust your LPR after you have set your main reg, not before. The LPR works off the main regs output. So adjusting the LPR without the HPR being there will just make it wonky once you add the HPR into the mix.
Leave the stab on it. Sweet spot the reg. then adjust the LPR as needed once your reg is set and desiered FPS is keyed into the RVA
and like i said, for quiet...get a gauge...and set it to the lowest setting it can run at. I want to say it's 400 or 500 PSI. PPS can confirm one or the other. Just understand quietest will use more gas then a sweet spotted reg, which will be most effecient, just louder.
This post has been edited by Legato: 15 August 2009 - 11:54 PM