A forgetful oldgoat needs help
I haven’t set up a regulator in over a year and I ran into a problem today.
Last year, I bought some 25 cal. JSB Exact King Heavy 33.95 grain pellets and turned my R3 Matador’s reg up to shoot them at 880 fps. They weren’t any more accurate, at 100 yards, than the 25.4 grain JSBs. I could only get 40 regulated shots per fill so, I gave up on the Heavy pellets and put the Matador back in my gun safe.
This Sunday, I am meeting a couple of air gun buddies and we are going to a couple of cattle farms to shoot some pigeons, starlings and Asian doves so, I turned the HST and the regulator down to 127-130 bar and did a couple of shot strings. IIRC, I used to get 69-70 regulated shots at 885 fps. I’m currently getting 59.
I can’t find my tuning notes and I don’t have the time to play with the gun much more before Sunday, a friend with benefits came by yesterday and messed my schedule all up. I should have told her no but, it’s kinda hard when she’s ready to go!
Anyhow, I’m thinking that I need to turn the reg up a little more and play with the HST some. The current shot string has a maximum deviation of 10 fps before going off of the reg. I might have to leave the gun as is and just fill it up sooner this weekend.
Any thoughts or suggestions?
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OMG, my Edgun Brother come back ,,, yoohaaa … :8: :8: :8:
welcome back my Edgun bro ,,, i really miss you and never forget about you and your favors that you did to me ,,, just mentioned your name and your great tool in my last post … i always think about you ,,,i sent you emails ,,but i know and understand that you are not able to reply like before .. i know this ,,
however im ashamed to write advises for you, but the above couple replies are good answers for your question, test your reg with reg tester just in case if the reg pressure is still on 127 or 130 as you mentioned, ??? if yes,,,then all is around your HST … you are the doctor and im sure you are able to fix it soon ,,,
please keep posting here ,,, i will be happy to see your avatar :biggrinn: :biggrinn: and writing ,,,
i never forget about anyone ,,,even more time i am thinking about our big bro Trigvy from Norway ,,, i miss you both always ,..
Good to see you back Oldgoat !
If I recall correctly it’s all about balancing the HST with the set reg pressure- the goal being the max pellet speed (around the 880/890 fps mark) being achieved when winding the HST in gives you little or no more than the max desired speed. This is the most efficient setting goal.
When faffing around with the reg I seem to remember that you have to shoot it down past it’s new ‘set point’ e.g. If the reg is set to 120 bar, shoot it down to 100 bar for the new setting to ‘settle in’
Also the end of the shot string (if you have the luxury of lots of chrony time) tells you if the reg pressure is too high/low or if the HST is too high/low
This link is absolute gold dust for information regarding efficiency ‘nirvana’
http://talonairgun.com/forum/viewtopic.php?f=34&t=22808
Used it many times myself, get a beer and read through it and I’m sure it’ll get you back to where you need to be :8:
Either that or take a fully charged air tank on Sunday 😉
Never though I’d be giving the EdGun doctor advice, consider it payback for all of your helpful advice in the past 😀
Hope this helps !
The Cad
Hey Ted.. if your reg is at 130 it sounds like you have just tightend the hst outside of its sweet spot which just makes it louder and waist air.
Back the hst right off and wind it up slowly while testing over a chrono intimitantly. Take it to 880 in small adjustments and dont go any further.
Have a good shoot 😉
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Old Goat, I did the same thing chasing the heavies with my EDgun. After shooting the .25 with the regulator adjusted up for a while, I decided the noise and air hunger wasn’t worth it. I turned my regulator back down to 130 BAR ( I have come to believe Ed’s setting is the best) My Matador experienced the same symptoms as you described in this post. I found my hammer spring lost some spring! I decided to replace it, and with the new HS, my velocity was back to the factory setting. Might want to check the spring, often overlooked component for required valve dwell time. Good luck on your hunt!.