.338 Norma 28" Versus 30" barrell Speeds 300 SMK

pc3

Sergeant
Full Member
Minuteman
May 26, 2008
775
3
Australia
Hi Folks,

my Smith is really keen on a 30" barrell for this but I think 28" will be plenty; how much speed with 300 SMK would I lose from going with the 28" over the 30" ?