Has anyone experien...
 

Has anyone experienced the sudden velocity drop in your...  

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eagleeye
(@eagleeye)
Joined: 2 years ago
Posts: 21
2019-06-15 16:47:16  

FX tarantula? It always has stayed super consistent with all JSB makes and weights but now out of nowhere it s not going up past 750 with jumbos!

I did however check the internal and hammer spring and they looked to be fine. Here is what I did before testing out the result after reassembled.

-  checked the valve and took it apart and looked for any broken o ring or valve stem nothing found!

- FAC hammer spring used and was turned all the way in 

- the transfer port adjusting screw was left all the way open for maximum flow and it was closed for any air would scape. No air lost there!

There must be something that it s not doing its job or something obstructing it. Any insights would make this weekend go smoother. 

Much appreciate it.

 

 


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pluric
(@pluric)
Joined: 2 years ago
Posts: 459
2019-06-15 17:56:17  

Breech seal???


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eagleeye
(@eagleeye)
Joined: 2 years ago
Posts: 21
2019-06-15 18:11:00  

Good reminder will look in to that and report back.


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Talldog
(@talldog)
Joined: 2 years ago
Posts: 27
2019-06-15 18:32:35  
Posted by: eagleeye

FX tarantula? It always has stayed super consistent with all JSB makes and weights but now out of nowhere it s not going up past 750 with jumbos!

I did however check the internal and hammer spring and they looked to be fine. Here is what I did before testing out the result after reassembled.

-  checked the valve and took it apart and looked for any broken o ring or valve stem nothing found!

- FAC hammer spring used and was turned all the way in 

- the transfer port adjusting screw was left all the way open for maximum flow and it was closed for any air would scape. No air lost there!

There must be something that it s not doing its job or something obstructing it. Any insights would make this weekend go smoother. 

Much appreciate it.

 

 

Karma …  I hope.


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doninva
(@doninva)
Joined: 2 years ago
Posts: 128
2019-06-15 20:38:48  

Is it regulated? My Steyr LG110 did that and it was the regulator. Don


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eagleeye
(@eagleeye)
Joined: 2 years ago
Posts: 21
2019-06-16 12:03:27  

The breech O-ring is there. At some point today I ll have to take it apart to recheck everything with magnifier 😉


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eagleeye
(@eagleeye)
Joined: 2 years ago
Posts: 21
2019-06-16 12:10:52  

It is unregulated but it does better than regulated ones out.


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pluric
(@pluric)
Joined: 2 years ago
Posts: 459
2019-06-16 23:15:59  
Posted by: eagleeye

The breech O-ring is there. At some point today I ll have to take it apart to recheck everything with magnifier 😉

I'd still check to see if it has any blow back. I just had one look fine but leaking. FPS increased after replacement. Not dramatic, but it did make a difference and spread stabilized. 


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eagleeye
(@eagleeye)
Joined: 2 years ago
Posts: 21
2019-06-18 20:02:24  

Solved! Spring was not FAC and it is up to its specs 😁 lunching jumbos at 875 for the entire string! Thank you all for your inputs


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