Length barrel fps

[mattt]

I have a 26" 308 that shoots 2570 with 43 varget 175 smk.What would same load do in 30 barrel?

 

[M700]

I see about a 150 - 200 fps difference between identical loads between my 24" and my 30" barrel .308 Win rifles.

A 155 at 2850 from the 24" tube was 3000 - 3050 fps from the long barrel. Normally I use Varget.

Not exactly the same as your load, but might be helpful.

Guy

 

[jonbearman]

+1 for M700 as I have been told it is about 25fps per inch of barrel.