New FX .25 SLUG liner now apparently 1:16 twist rate.

Same here, debating between the coldshot and the less expensive Raven jack at almost half the price. I may just pull the trigger on the Ravin Jack as it is available thru Amazon and if I don't like it... 😊


Allen



Let us know how the Raven jack works out for you. The coldshot supposedly has pretty accurate and repeatable adjustment and comes in MOA and Mil version. Very interested to see how the raven jack will stack up.
 
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Here is my best groups with this new barel.
Right with .25 cal left with.251 at 30 m.

And I’m not really happy with these groups.

Impact M3 .25, JSB KnockOut MKII

Weather: 21.7°C 4.6 m/s heavy intensity rain 1013hPa/mbar 29.91inHg 78%

Shot count: 21

Low: 954 FPS
Hi: 1012 FPS
Avg: 991 FPS
Spread: 58 FPS
STD Dev: 13.9 FPS

19-Jun-2024 18:51:44;954;FPS;91.8;J;
19-Jun-2024 18:52:26;976;FPS;96.1;J;
19-Jun-2024 18:52:39;972;FPS;95.3;J;
19-Jun-2024 18:52:59;976;FPS;96.1;J;
19-Jun-2024 18:53:11;986;FPS;98.1;J;
19-Jun-2024 18:53:26;981;FPS;97.1;J;
19-Jun-2024 18:53:44;987;FPS;98.2;J;
19-Jun-2024 18:54:05;983;FPS;97.5;J;
19-Jun-2024 18:54:15;982;FPS;97.3;J;
19-Jun-2024 18:54:26;991;FPS;99.0;J;
19-Jun-2024 18:54:42;990;FPS;98.9;J;
19-Jun-2024 18:55:03;1004;FPS;101.7;J;
19-Jun-2024 18:55:30;1002;FPS;101.3;J;
19-Jun-2024 18:55:48;1001;FPS;101.1;J;
19-Jun-2024 18:56:06;999;FPS;100.7;J;
19-Jun-2024 18:56:25;1012;FPS;103.3;J;
19-Jun-2024 18:56:54;1008;FPS;102.5;J;
19-Jun-2024 18:57:30;1002;FPS;101.3;J;
19-Jun-2024 18:57:52;1001;FPS;101.1;J;
19-Jun-2024 18:58:07;999;FPS;100.7;J;
19-Jun-2024 18:58:20;1001;FPS;101.1;J;



IMG_1808.jpeg
 
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Ive had the best groups with the lighter zan's in my heavy liner .25

And I have tried all zan weights, a few HN and the JSB mk1 and mk2.

That being said with my setup, 700mm tension barrel and hausken suppressor the 26.5gr mk2 zan shoots the best with the 28gr in second place.
But as I have read the heavier HN and zan shoots amazing with others so I may just be that I have tensiond the barrel wrong for heavier slugs or the suppressor may throw them off.
 
Judgement day: zAN 41 ge

Impact M3 .25 600 mm 1:16 STX, Zan Slug

Weather: 25.8°C 2.1 m/s clear sky 1010hPa/mbar 29.83inHg 50%

Shot count: 5

Low: 965 FPS
Hi: 972 FPS
Avg: 968 FPS
Spread: 7 FPS
STD Dev: 2.7 FPS

25-Jun-2024 21:57:41;971;FPS;116.4;J;
25-Jun-2024 21:57:54;967;FPS;115.5;J;
25-Jun-2024 21:58:17;967;FPS;115.5;J;
25-Jun-2024 21:58:37;965;FPS;115.0;J;
25-Jun-2024 21:59:07;972;FPS;116.7;J;

IMG_1838.jpeg


And I m sure I can get better results.
 
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Judgement day: zAN 41 ge

Impact M3 .25 600 mm 1:16 STX, Zan Slug

Weather: 25.8°C 2.1 m/s clear sky 1010hPa/mbar 29.83inHg 50%

Shot count: 5

Low: 965 FPS
Hi: 972 FPS
Avg: 968 FPS
Spread: 7 FPS
STD Dev: 2.7 FPS

25-Jun-2024 21:57:41;971;FPS;116.4;J;
25-Jun-2024 21:57:54;967;FPS;115.5;J;
25-Jun-2024 21:58:17;967;FPS;115.5;J;
25-Jun-2024 21:58:37;965;FPS;115.0;J;
25-Jun-2024 21:59:07;972;FPS;116.7;J;

View attachment 474952

And I m sure I can get better results.
What distance is this?

Allen