I have one 03 which had barrel cut to 18 inches and turned down in diameter significantly.
Also have 06s with 20, 22, and 24 inch barrels, and frankly cannot tell the difference in performance between any of them. Sure, chronograph shows some difference, perhaps 20 fps per inch, but not one iota of difference for practical purposes.
I am getting to an age where carrying a heavy rifle is no fun anymore.
My "big" gun is now a Remington model 7 in .350 Rem mag, 20 inch barrel
my "little" gun is a custom .257 Ackley, with a 21 inch barrel, the smallest contour Douglas makes.
Both guns are light and handy, and the muzzle blast is not even noticed.
My point, cut the barrel to the length you wish, you will not be sorry.