You lose 12 to 25fps per inch of barrel, not a big deal...
More like 30-40 fps/inch, in a .416... more with the lighter, faster cartridges...

I have a Ruger Alakan in .375 Ruger with the 20" barrel. It's an awesome rifle to carry. It's not like the .416 Ruger is a long range cartridge and you need to squeeze every last FPS out of it.
Aside from the velocity perhaps you should try shouldering both. At one time I owned a 35 Whelen with a 26" barrel. Lots of guys said it would hang up in the bush (never) and be a burden to carry (never was). What I liked about it was how smooth it was to hold and shoot offhand. Velocity is one consideration but pointing and shooting is another. Just my opinion.
Wikipedia said:The modern usage of the term carbine covers much the same scope as it always had, namely lighter weapons (generally rifles) with barrels less than 457.2 mm (18.00 in). These weapons can be considered carbines, while rifles with barrels of 457.2 mm (18.00 in) or more are generally not considered carbines unless specifically named so, and depending on the weapon's power.




























