Barrel length and velocity

[Brandonlowe17]

Anyone have any experience on shorter barrel lengths for 6mm?
Getting a proof carbon barrel and its gonna be set up as coyote rig.
Wanted to go a little shorter maybe 18" or 20"
Any info would be much appreciated

 

[Supersubes]

I shoot a 87 vmax load out of a 20” creed at 3180 avg. Safe year round load. The 6mm is no different to anything else. 30 fps per inch loss give or take.