Tuning Taipan .25 optimal velocity

[HARLEY01]

So I have a new taipan veteran compact in .25. It came from talon tunes at about 890-900fps with 25.4 fx . I really don't need power as much as accuracy as I only have about 60yds to work with. What are your recommendations for what has worked for you? 

 

[tommyb]

I have the Taipan .25 Long and have done a lot of chrono strings with both JSB and FX 25g. Optimum accuracy for me at distances to 50 yards is 900-905 FPS.

 

[ladwict]

Perfect base speed !!! Minor changes on hammerspring might fine tune your harmonics but just start shooting an few hundred pellets first and see.

 

[tommyb]

Yeah, I went from a low of 850 to 950 with small HST adjustments, using about 10-15 FPS increments. My best ES spreads were in the 880-915 FPS range ( 10-15 ). 

 

[HARLEY01]

I'll start at 850 and go from there...thanks for the input!

 

[HARLEY01]

Can the shroud be moved forward to make it quieter?

 

[elh0102]

Can the shroud be moved forward to make it quieter?

I don't know. It might be easier to reverse it, but I haven't looked that closely at mine, which is a Standard. I added a silencer and it's whisper quiet. But, I can tell you from shooting my friend's Veteran .25, it is louder. I'm not sure if tuning it differently would help or not, maybe a different balance of HST and reg set point?

 

[HARLEY01]

It's not loud..I was just curious if it was possible. I have 5 different mods to experiment with. But keeping it short is good. Thanks

 

[HARLEY01]

Thnk you! I'm pretty sure it came tuned very well...I was really hoping someone had luck with lower velocities..

 

[elh0102]

Thnk you! I'm pretty sure it came tuned very well...I was really hoping someone had luck with lower velocities..

I'm sure it did. My point, you can maintain the same velocity with a different combination of HST and reg setting. The duration of the valve opening will influence sound. Whether you would find a combination that maintains accuracy and reduces sound, only testing would determine. My guess, it would not be worth the time and effort. 

 

[HARLEY01]

Thank you once again! I'll probably just shoot it as it came..

 

[tommyb]

I'll start at 850 and go from there...thanks for the input!

Please update this post once you test out optimum velocities. There are at least several Taipan .25 owners who would have an interest in your results. BTW - Mine shot pretty darn good at 865 also, but I would have to retest and take notes to validate more accurate testing. 

 

[HARLEY01]

I will definitely post some results...new speed dialer on the way. I should have some info in the next few days 

 

[tommyb]

Jerry

Not sure if this helps/hinders, but just to give you some idea of a couple Chrono runs. I also have many more shot strings that range from 900 - 945 FPS. I will say, that trying to achieve the lowest possible ES and SD spreads and correlating to optimum accuracy is like chasing a ghost; for me anyway!

=============================================================================================================



Woody’s Jan 30 2021

Taipan 

50 yards

JSB 25 g Exact King



Shot count: 10

Low: 865

Hi: 877

Avg: 872

Spread: 12

STD Dev: 3.7

868

877

875

872

875

875

870

872

870

865



Shot count: 10

Low: 863

Hi: 879

Avg: 873

Spread: 16

STD Dev: 5.1

863

872

872

868

872

879

872

879

877

877





Shot count: 12

Low: 868

Hi: 879

Avg: 874

Spread: 11

STD Dev: 3.6

879

877

875

877

872

875

872

870

877

870

870

868



Moved HST 1/4 turn 

Shot count: 10

Low: 893

Hi: 905

Avg: 901

Spread: 12

STD Dev: 3.4

893

898

900

900

903

903

905

900

903

900



Shot count: 9

Low: 889

Hi: 893

Avg: 892

Spread: 4

STD Dev: 1.4

891

893

891

891

893

893

891

893

889



Shot count: 9

Low: 886

Hi: 903

Avg: 897

Spread: 17

STD Dev: 4.9

886

898

896

898

898

893

900

903

900

 

[HARLEY01]

Thanks for the info! Seems like small changes make quite a difference in consistency 

 

[HARLEY01]

So to update..original tune of about 900fps seems to be optimal, although everything from 835 and up was still quite acceptable. I will stick with the original tune due to flatter trajectory. Hope this helps, and thanks to everyone who commented!

 

[JohnnyPDX]

So to update..original tune of about 900fps seems to be optimal, although everything from 835 and up was still quite acceptable. I will stick with the original tune due to flatter trajectory. Hope this helps, and thanks to everyone who commented!

It's nice to be content and have a great time with it!

 

[HARLEY01]

So to update..original tune of about 900fps seems to be optimal, although everything from 835 and up was still quite acceptable. I will stick with the original tune due to flatter trajectory. Hope this helps, and thanks to everyone who commented!

It's nice to be content and have a great time with it!

It does!

 

[JohnnyPDX]

So to update..original tune of about 900fps seems to be optimal, although everything from 835 and up was still quite acceptable. I will stick with the original tune due to flatter trajectory. Hope this helps, and thanks to everyone who commented!

It's nice to be content and have a great time with it!

It does!

I was just shooting my BSA r10 TH and soooo happy with it too. I usually ALWAYS reach for the Taipan VL .25 but the BSA hit the sweet spot too