7x57 velocity question

[donw]

not sure if this is the correct forum but i'll ask anyway...if it's not...hopefully some one will direct it to the correct forum.

i want to cut my 22" barrel down to 20"

how much will that affect the velocity on my 7x57 reloads?

thanks

[Bill Steele]

It depends on the load you are shooting. Faster powders will show less of a difference, slower more. You hear a lot of rules of thumb, like 50 FPS per inch, etc. But really, it all depends on the load you plan to use.

Likely, whatever you shoot with it won't know the difference.

[wtkaiser]

You probably won't see 100 fps difference. Maybe half of that. But short barrels bug me, so I will stop now.