I've humped many mountains over the years with my 29 inch 270AI and then a few years of my 30-378 and 7STW with a 28 inch and two inch brake. The only time that the length got me was hunting out of my state where the game trails in the trees was maybe 6 feet tall or so. I sometimes thought that I was bent over enough to duck under and the barrel would snag.
I know that you did not ask, But as I got older the pleasure of 30 cals and bigger diminished. The 7STW was my go to elk gun and I loaned it out to all kinds of friends who were also impressed on their out of state elk adventures. 7mm has some great BC's compared to 30 cal hunting bullets. I shot a lot of 7mm 175 and 180's. I had a 1:9 twist rate on my custom 7STW
http://www.bergerbullets.com/products/hunting-bullets/
I know that you did not ask, But as I got older the pleasure of 30 cals and bigger diminished. The 7STW was my go to elk gun and I loaned it out to all kinds of friends who were also impressed on their out of state elk adventures. 7mm has some great BC's compared to 30 cal hunting bullets. I shot a lot of 7mm 175 and 180's. I had a 1:9 twist rate on my custom 7STW
http://www.bergerbullets.com/products/hunting-bullets/