Rather than choose one barrel length, I shoot three 7mm-08 rifles: a Model 7 FS with an 18 1/2" barrel, a Howa Alpine with a 20" barrel and more recently I picked up a Remington 700 CDL with a 24" barrel.
Each rifle is set up to shoot specific bullet in different weights. For example the FS shoots TTSX pills, the Alpine Nosler E-Tips and the CDL 160 grain Barnes TSX bullets.
Being a rifle looney means you don't have to limit yourself to just one.
