Help me decide short barrel 6mm

[Alex Genereux]

I decided on 6 creed 7.5 twist but I'm going with a longer barrel to get some more speed for the 115s

What barrel length did you decide and how are the velocities? I am considering building an 18" 6 cm to shoot the 108 eldm. My range is 0-600 yards

 

[Hunter609]

What barrel length did you decide and how are the velocities? I am considering building an 18" 6 cm to shoot the 108 eldm. My range is 0-600 yards

I got a good deal on a 24" proof prefit. I'm getting 3090 with the 115 dtacs.