JSB Knockout .251

[Chief Ten-Beers]

It's Measuring the Bore.

 

[Chris44]

Ok I m going to try the .25 knockout instead of .251 to see if my groupings have something to do with slug diameters…

 

[Chris44]

Here are the results with knockout.25

Impact M3 .25, JSB KnockOut MKII

Weather: 18.9°C 4.1 m/s broken clouds 1011hPa/mbar 29.85inHg 94%

Shot count: 5

Low: 976 FPS
Hi: 982 FPS
Avg: 979 FPS
Spread: 6 FPS
STD Dev: 2.0 FPS

17-Jun-2024 13:09:25;978;FPS;96.5;J;
17-Jun-2024 13:09:46;980;FPS;96.9;J;
17-Jun-2024 13:10:16;978;FPS;96.5;J;
17-Jun-2024 13:10:35;976;FPS;96.1;J;
17-Jun-2024 13:11:03;982;FPS;97.3;J;

 

[Chris44]

Second string

Impact M3 .25, JSB KnockOut MKII

Weather: 18.9°C 4.1 m/s broken clouds 1011hPa/mbar 29.85inHg 94%

Shot count: 5

Low: 981 FPS
Hi: 991 FPS
Avg: 985 FPS
Spread: 10 FPS
STD Dev: 3.8 FPS

17-Jun-2024 13:14:25;981;FPS;97.1;J;
17-Jun-2024 13:14:55;985;FPS;97.8;J;
17-Jun-2024 13:16:09;991;FPS;99.0;J;
17-Jun-2024 13:16:40;981;FPS;97.1;J;
17-Jun-2024 13:17:19;987;FPS;98.2;J;

 

[Chris44]

Without fine tuning groups are better …

 

[Chris44]

Same settings with the 2 slugs:

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;