It's the reason also these military cartridges had bullets heavier than we'd now usually use in them. So 160 grain in the 6.5mm, 175 grain in the 7mm and etc.. The better sectional density gave a capability of what I think was called "searching fire". That is you could at long range fire at a point just above the crest of a rise with a reasonable expectation that there was a chance that the trajectory of the bullet would then allow it to "search" behind that crest making a benefit from the trajectory curve that such heavy bullets possessed. Certainly this is mentioned in a number of the British Army manuals of the period before World War 1.The 6.5x55, 6.5x54 and 7x57 were developed as military cartridges in the late 1800’s where the ability to hit man sized targets at 1000 yards and provide harassing fire further was a requisite.