Blackhole AR barrel Velocity

[Remingtonman]

I was wondering what the difference in velocity would be between a 16" BH barrel compared to an 18"? Am i going to gain much by going with a longer barrel?

 

[R Johnson]

What chambering are you inquiring about?

 

[Remingtonman]

Woops forgot to mention that. I was looking at comparisons for the .223-5.56 round.

 

[R Johnson]

The difference should be 30 to 35 FPS per inch. The longer you go the smaller the increase will be. It will finally settle in around 25 FPS per inch when you get over 20"

 

[Remingtonman]

Great thanks for the info Ritch