How does turning the hammer spring screw get you up to 140 bar? The hammer spring adjustment does not effect regulator pressure.
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Tuning FX Wildcat MK3 - sudden dramatic velocity loss
- Thread starter ronmcc4
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How does turning the hammer spring screw get you up to 140 bar? The hammer spring adjustment does not effect regulator pressure.
That’s what I thought also, but it does effect it. I turned my hammer spring screw out 6 turns and made a world of difference.i thought you could just up the regulator and get more power. I was wrong, in order to up the regulator pressure you have to adjust the hammer to hit harder. Hope this can help you mr. grimm
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You might have to adjust the hammer spring tension to realize the additional power from a higher reg setting, and it might be a counter intuitive adjustment, but it does not itself affect the reg pressure.
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The FX tech called today to tell me he had fired 30 or so shots (before he did any work) and the velocity was exactly as I reported before the problem showed up. Say what?! He said he’d test some more before sending it back but didn’t see anything wrong so far. I am mystified and he doesn’t understand it either.
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Well I guess I just made a mistake ... I sent the rife to FX of course. They called several days ago and said they couldn't find anything wrong and the rifle was shooting with the same velocity I reported it doing out of the box. I asked them to double-check. I got the rifle back today with their notes, etc. No problem found. So - I took the rifle downstairs and strapped on the FX chrony. Same velocity drop I'd seen before I sent it. I started to get a little miffed. Then, I started to wonder....I got out the old Caldwell chrony with the screens and IR lights, etc. Sure enough - velocity pretty much the same as it was when I got it. Turns out the FX chrony has gone south as far as I can tell (more tests tomorrow). 
I sure wish I had tested that BEFORE I sent the rifle to FX. Oh well -- live and learn.
I sure wish I had tested that BEFORE I sent the rifle to FX. Oh well -- live and learn.Upvote 0
The final solution -- I retested the FX Radar with my Pulsar where I know the speed of given pellets, etc. and it was very erratic. One shot string would be spot on and the next string (after a disconnect and connect) would be very low - as much as 40 FPS low. I was shooting with the FX Radar attached and the pellets going through a Caldwell chronograph - the difference was obvious. So I called FX. The customer support person suggest that before I get an RMA, to check the batteries and the uninstall and reinstall the app. I checked the batteries - they were fine. So I uninstalled and then reinstalled the FX Radar app. I then retested using the FX Radar and Caldwell chronograph at the same time. Problem solved! The speed were within a few FPS of each other for all pellets and various power levels.
So - problem solved. But - how do I know it won't happen again? And would I realize it if it did; especially with a new untested pellet or tune? Probably best to use the two chronographs I have to verify each other for critical applications I think.
So - problem solved. But - how do I know it won't happen again? And would I realize it if it did; especially with a new untested pellet or tune? Probably best to use the two chronographs I have to verify each other for critical applications I think.
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When the FX Chrony was acting up, was the results jumping all over the place, that you would recognize the odd pattern? Even with a new pellet, the gun should shoot it at a consistent FPS?
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There was some "more than would be expected" variation within a shot string. The big difference was if you disconnected the FX Radar (as in when you change the profile or something) and then do another string the results cold be very different. But - since I reinstalled the app, I've disconnected and reconnected many times and the results were right along with the more traditional Caldwell chronograph.
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