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The larger dimensions of the .300 Win Mag compared to the .308 Norma Magnum and .30-338 Winchester Magnum cartridges ensures that rifles chambered in such rounds can readily be rechambered to the .300 Win Mag, though the shorter neck of the longer round necessitates comparable bullets must be seated more deeply in the case.
Due to the gaining popularity of the 7mm Rem Mag, in 1963 Winchester launches the last member of the Winchester Magnum family of cartridges; the .300 Winchester Magnum; a standard length action belted magnum driving a 180 grain bullet at 3000 fps and a 150 grain bullet at a muzzle velocity of 3300 fps. The cartridge took off slowly but managed ...
.30-378 Weatherby Magnum.30-40 Krag.300 Precision Rifle Cartridge.300-221.300 AAC Blackout.300 H&H Magnum.300 Blaser Magnum.300 ICL Grizzly.300 Lapua Magnum.300 Norma Magnum.300 Remington Short Action Ultra Magnum.300 Remington Ultra Magnum.300 Rook.300 Ruger Compact Magnum.300 Savage.300 Sherwood.300 Weatherby Magnum.300 Whisper
The .300 WSM also head-spaces off of the case shoulder, versus the older .300 Winchester Magnum's belted head space design. The advantage to this round is the ballistic performance is nearly identical to the .300 Winchester Magnum [ 2 ] in a lighter rifle with a shorter action burning 8 - 10% less gunpowder.
Size: Metric size - may not be official; MV: Muzzle velocity, in feet-per-second ... Winchester Short Magnum .300 Norma Magnum: 2012 US 1 [47] R 7.62×63.3mm 3003 ...
The .300 Winchester Magnum chambering also has a non-traditional 280 mm (1 in 11 inch) or 36.7 calibres right-hand twist rate. Due to the .300 Winchester Magnum cartridge dimensions it is a long TRG-41/TRG-42 bolt-action chambering.
An experimental variant re-chambered for the .300 Winchester Magnum (7.62×67mm) round. It was not adopted by the US Army due to concerns that operators would not be able to acquire the special ammo. Also, the available .300 Winchester Magnum ammo that was procured sometimes misfired due to incompletely-burned propellant in the longer cartridge.
7mm Remington Short Action Ultra Magnum.308 Winchester – considered interchangeable with 7.62×51mm NATO according to SAAMI. 7.62x51 NATO - Original cartridge.300 Winchester Short Magnum.300 Remington Short Action Ultra Magnum [33].325 Winchester Short Magnum.338 WSM.338 Federal; 8.6 Blackout.358 Winchester.358 Winchester Short Magnum.375 Raptor