Ok stop the horrible, old fashioned, gunwriter dribble. Long barrels don't produce higher velocity due to total consumption of powder. A 7mm Rem Mag case full of RL25 is fully burned in the first 18"-20" of barrel. The rest of the gained velocity is rocket effect due to the powder gases fully expanding and such. Barsness did articles on it, Jamison sat in a lab somewhere and tested it, and the US military spent a ton of time studying barrel length/powder/gas expansion, etc, not to mention #### Casull.
With the case capacity vs bore and the fast powders we use in the 303 the difference between a 20" and 26" barrel is so minute, that to propagate it as a good reason for every one to vote for it isn't worth the post. This rifle isn't going to resurrect the .303 British onto the front page of Handloader or Shooting Times as the sleeping giant of the twenty first century.
The majority of the people looking at this cartridge in this rifle are looking for a single shot stalking rifle uniquely Canadian. That means some of use plan on packing these things through dark timber, alder thickets, ridge backs, and even up scree slopes and alpines. 1.25lbs and an extra 2-4" means more to that than an extra 60fps on a chrony or some guy trying to stuff enough 7828 to turn the 303 into a rimmed WSM.
The .303 has already seen it's potential. It helped win two World Wars, fought in numerous other conflicts in the hands of commonwealth soldiers, killed elephants in the hands of Mr. Bell, shot tigers, and was the first centerfire cartridge many here in Canada shot. We don't need to see a 174gr RN cross a chrony screen at 2600fps+ to tell us what it's potential is. There are few cartridges out there with the historical pedigree to look it in the eye for goodness sake.
The old fella with the need for a longer sight picture due to aging eyeballs is by far a more reasonable argument for a longer barrel on a .303. I for one have no ambition to pack what could be considered a gangly teenager of a rifle when I have the chance to carry a lithe and classy dame.