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Looking for Impact .25 Pin Probe.

Forums PCP Airguns PCP Airgun – Tuning & Repair Looking for Impact .25 Pin Probe.

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    Drumsnguns
    Participant
    Member
    United States
    Accuracy: +11

    Was looking at Ernest's TP upgrade as well as Huma's Dual TP but I can't seem to find the pin probe except in the FX power kit. I don't want to buy all of that; just need the probe. Is there anyone out there selling just the pin probe/

    Thanks

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    Eaglehorn
    Participant
    Member
    United States
    Accuracy: +7
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    Drumsnguns
    Participant
    Member
    United States
    Accuracy: +11

    Thanks Eaglehorn. 

    Have you tried this out? Looks good

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    Glem.Chally
    Participant
    Member
    Canada
    Accuracy: +112

    Just curious, why do you want the pin probe?  Power gains or for seating depth?

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    Eaglehorn
    Participant
    Member
    United States
    Accuracy: +7

    Drumsnguns

    Thanks Eaglehorn. 

    Have you tried this out? Looks good

    I've only used the FX kit.  That probe has worked fine for me.  Nielsen makes a quality product though so I'm sure it's good too.  Not sure why it's $80 when the FX kit is $50 with the extra parts.

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    Jimmy001
    Blocked
    Blocked
    Accuracy: +0

    i can make you one i have full machine shop . its funny what ernie calls upgrade is a design from early 1900 hundreds ,All of the guns i own have retracting probes when the bolt closes the pin retracts , i am the only person as far as i know who has ever done this , and i have all kinds of gone all customized guns, hatsan blitz full auto with fx slug liner shoting 38 grain 25 cal slugs with fx ultra tight groups at 980 fps.i get frustrated whatching so called experts miss inform people everyday on you tube,

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    Drumsnguns
    Participant
    Member
    United States
    Accuracy: +11

    Glem.Chally, sorry for the late response. Actually I'm researching the FX pin probe and the Huma enlarged probe that comes with the Huma Double TP kit. I'm thinking I'd like to get that TP so I can back off the reg and save air for the same velocity. 

    I'm trying to figure which probe would be better. I understand how each works and I've seen the pin on many of the upper level air guns. I saw  in another post that the pin probe got better SD numbers for one guy, but he wasn't comparing to the enlarged probe. 

    I could get the Huma as a kit or just the TP and go for the pin probe.

    If you or anyone has any comparison data I'd really like to hear about it.

    Maybe I'm over thinking this too much…….

    Thanks

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    Drumsnguns
    Participant
    Member
    United States
    Accuracy: +11

    Jimmy001, You make an interesting point. Perhaps you have an opinion on the enlarged Huma Probe vs the pin probe that you can manufacture. Perhaps you could PM me w details and price for .25 cal Impact Gen2.

    The funny thing is, I had wanted to shoot slugs but there hasn't been a Superior or Superior Heavy 700 mm liner on the maket for half a year and no ETA in sight. So for the moment I'm not in a hurry. I could move ahead with the Dual TP for MKII pellets, though.

    Thanks for the input.

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    Drumsnguns
    Participant
    Member
    United States
    Accuracy: +11

    Eaglehorn, Yeah the NSA probe seems pricey.

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    Bigragu
    Participant
    Member
    United States
    Accuracy: +74

    I apologize if I’m steering you on the wrong part, but if you’re talking about the Matt Dubber slug power kit pin probe, Pyramid air has them in stock

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    Glem.Chally
    Participant
    Member
    Canada
    Accuracy: +112

    A properly ported stock TP will make the same power as the Huma one, and if you do it right no extra worry about tipping slug tips into it.  Same with the probe.  

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    2L8
    Participant
    Member
    United States
    Accuracy: +12

    Drumsnguns, I can share my experience with my .22 Impact. I have both the FX Slug Power Kit and the NSA Pin Probe. I also modified my stock probe and TP. Glem.Chally has it right about a DIY modifying the TP port.

     I elongated my TP 1mm on both my .22 and .25 (Dreamline), smoothing out the edges to increase laminar airflow the best I could.

    All said and done, there were some good points and not so good points about all 3 of them.

    Lets start with the first one I purchased, the NSA. I wanted to try the FX "pin" after I modded my original just to compare, of course I hemmed and hawed a week to long and they vanished, dang, now I have to wait for the next batch. But wait, my friend Rick from rmp_airguns says "did you see the new NSA Pin Probe for $80 @ UA?" Boom, I was on it and had one in 3 days. Install is straight forward after you break loose the Black Loctite with iirc 2.5mm allen.  Have a good new allen key of high quality or it's over, just say'n. After installing the probe and doing a depth adjustment with blue tape as my guide I was ready. There is an .018 difference in the cam arch movement to max depth and set depth after cocking.

    I found that when the NSA pin was adjusted to "maximum slug depth" it was determined by the pin placement, after being cocked to insert the magazine, flush with the backside of the magazine slot. This flush reference point is the "Maximum" depth possible. The difference in depth after adjusting for the magazine insert baseline between the NSA and my stock probe was .050 in favor of the NSA.

    The story continues…

    Problem #1 with the NSA I discover is that at that max adjustment the taper at the back of the NSA probe is now encroaching on my newly ported TP!!! What have I gained now? I readjust the probe back out so the taper clears the TP. All good.

    Now I am tuning for a Slugs. There are 4 I have in mind.

    FX Hybrids, NSA 23, JSB KO, NSA 27.5. All very different base depths.

    Now is where it becomes interesting.

    As you can see the probes offer different depth options in the way it moves the Slug/Pellet into the liner. What you see here is an .075 difference in set depth between a Pin and a modified FX Probe with these slugs. Looking closely you will see that the standard Probe will seat any projectile at "maximum" depth because of it seating from the rim base, whereas the "pin" depth is determined by the center concave depth of the slug/pellet which varies from "0" flat to ".075" FX Hybrids in my collection.

    My original probe mod taking only 50% of the diameter away for the mod gave me a 20fps increase and after the TP mod was another 10fps. I will take 30FPS for free as would we all. This 50% amount allowed the slugs to move through the magazine with no glitches and over the oval TP was not a problem for 23gr slugs "dropping" into the TP.

    What I learned about the NSA Pin probe is that trying to adjust the large grub screw in the back to set the whole pin probe for a particular slug is, well, that's not going to happen more that once, pick a slug and live with it. The idea that is promoted for "larger and stronger" is a mute point for me. No advantage that I see. It was a challenge to get the grub screw to "catch" the Pin and "jam" it before it turned and changed your depth, was trial and error. Not user friendly. Instructions were frankly non existent other than photos for reference. Installing the new NSA probe did not change my FPS at all over my stock mod with oval port .

    Second problem was that my new Saber Tactical cheek riser no longer worked because the probe block was so large it interfered with the screw mount. Oops! bummer.

    Opinion: The NSA is well machined, and that is very much appreciated.

    I finally received the "FX Impact Slug Power Kit" , took out the NSA and installed the FX with the original probe holder with blue and NO black Loctite. Knowing you could adjust the pin probe depth without moving the main probe body  gave me more adjustability for the pin where the probe taper could be adjusted behind my TP and give better flow. 2 adjustments instead of one, Yes!!!. Bingo!!

    Did I say you get a .25 sleeve as well !!! FX Rocks.

    I will say that I could not install the FX spring and ball part of the kit as I have a Gen I converted to Gen II that had it's Valve spring adjuster " Black Loctite" on so I will need to replace the whole assembly in order to install the new spring and rubber ball, not FX fault but a 3 party that I wont mention…next on the to do list and to test.

    So my experience in both my Dreamline and Impact is that the DIY Probe and TP Mod are a great bang for your buck/time. If I needed to purchase a kit, the FX "Impact Slug Power Kit" as a great value for "plug and play" 

    As we know YMMV.

    I hope this helps.

    Be safe,

    Patrick

     

     

     

     

    • This reply was modified 1 year ago by 2L8.
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    Hunter82
    Participant
    Member
    Accuracy: +1

    2L8 pretty much covered it all, my experience was very similar.  I wanted the power left on the table +/- 30fps —> bought a huma transfer port with probe —> had mag jamming issues with the huma probe when cocking —> switched to nsa probe —> mag issues with loading —> switched to single shot loader —> now i am "happy"

    The domino effect of modding FX , lol.

    For now, I am happy with single loading an accurate tune.  My next step in this "evolution" is to see if switching back to the factory unmodified probe will solve the magazine issues but I feel that it is the magazine not liking my ammo (jsb knockout .217).

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    Drumsnguns
    Participant
    Member
    United States
    Accuracy: +11

    Thanks guys. Lots to think about. 
    I’m not sure I trust my skills in TP enlargement 

    Good info from all you guys

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