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.300 Win Mag is a damn awesome round! They seem to be inherently accurate, even from an out of the box cheap hunting rifle.

Probably why the Navy match teams worked with them extensively since the 1970s. The result was the Navy M84, now developed into the Mark 13 Mod 5 rifle in .300 Win Mag.

Press release: ATK subsidiary Federal Cartridge Co. in Anoka, MN received a $49.9 million firm-fixed-price, indefinite-delivery/ indefinite-quantity contract for .300 Winchester magnum ammunition. Maximum quantity is 80,100 boxes of 480 rounds each, minimum is 117 boxes. This ammunition will be used by U.S. forces engaged in combat, and by the US Navy in Match Team competition.

300 Winchester offers longer range, better accuracy, and more hitting power than standard NATO 7.62×51 mm rounds. The MK248 MOD 1 cartridge grew out of the .300 Winchester Magnum Product Improvement Program…

The guy on the left:

I have one of Malcomb Coopers AI rifles in 300 Win mag I purchased at great cost to my then poor NCO pay scale fed savings. It had been cut for a custom 300 Win Mag load that is longer than standard. Rounds were made for it by Sandia Die & Cartridge in Albuquerque, NM. Not sure if the company is still there.

Sandia headstamp on their loading. Was made for DOD and had a DODIC assigned. I had a USMC Unertl 10X on it and it shot better than anyone in my unit could make it if that makes sense. Changed its optics to a 16X Leupold Mk 4 Ultra from their custom shop later on as Marine Gunsmith made me a accurate copy of the M40A1 so the Unertl had to go on that. HAD to.....:o)

Bought 3 cases of the ammo out of pocket and was given lots more by uncle sugar. The rounds will not chamber in my other 300 Win Mags due it’s OAL.

Accuracy International rifle I own is a treasure and well made. Hope the quality is still there for those interested in one. Can’t say enough good things about the one I purchased.

Stay safe Archy !!!