Hmmm...........
I am afraid that all the "new" 6 ARC (Advanced Rifle Cartridge), 6.5, 7 or 300 PRC (Precision Rifle Cartridge), 6.8 Western, etc. etc. cartridges that have been flooding the blogs and YouTube over the last few months/years will go the way of the dodo promptly, just like the Imperial Magnum (Canada), Lazzeroni, Dakota, WSM (Winchester Short Magnum), RUM (Remington Ultra Mag), SAUM (Short Action Ultra Magnum), etc. etc. before them, as soon as the next "flavor of the day" pops up, and the ammo manufacturers assess that, after the initial burst of fashionable interest, there may be 3,000 or 5,000 rifles sold in each caliber compared to hundreds of thousands, or a few millions, rifles in .223 Rem, .243 Win, 7 Rem Mag, 300 Win Mag, 270 Win, etc.
Sure, I understand and appreciate the advantages of longer bullets with lower ballistic coefficient on trajectories, but the days of extending the Maximum Point Blank Range (MPBR) are over. Most traditional hunters are completely OK with the 300 yards that the classic cartridges deliver and could not care less about an additional 15 yards; and laser range finders and BDC (Bullet Drop Compensator) turret scopes have made MPBR obsolete for long range shooters.
As to the wind, the challenge has always been to
estimate the wind, not to correct for it, that part is easy...
Reloaders won't care about disappearance of factory ammo, but once their ammo has been lost in transit, good luck to find the once-latest American exotic cartridges in Harare or Bulawayo, Gaborone, Lusaka, Windhoek, Maputo, Dar es Salaam or Dodoma, or even Jo'burg or Pretoria...
Not to mention the fact that, as
BeeMaa observed, the actual field differences for hunting purposes between 7 PRC and 7 Rem Mag or Wby, or .300 PRC and .300 Win or Wby, etc. etc. are mostly academic, especially if, as already mentioned, the trajectory is compensated for by a BDC turret.
To each our own, and it does not bother me in the least what other folks are shooting, as long as it is appropriate for the game they hunt -- hint: 6.5 Creedmoor or PRC, etc. are NOT appropriate for Elk or Kudu at 600 yards -- but I shall repeat: hmmm...........