6.5x47 a 25" to 21" barrel velocity loss

[montana_native]

Any thoughts on the velocity loss with 140 grain bullets? I am currently shooting the 140 Amax at 2720 fps with a mild charge of Varget. How much will cutting 4" of barrel cost me?

Thanks!

 

[bheadboy]

you may be able to keep the loss to 80-100 by changing powders if you use the same powder could be as much as 125

Bob

 

[280nosler]

IF you believe Berger, and I do, you hare looking at a 100 FPS loss with a 4 inch cut.