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When comparing the .300 RUM and the .300 Weatherby Magnum, however, there is a difference in factory loadings. Performance data is often listed on the side of the ammunition box for those who wish to do an in-store comparison. On average, Weatherby factory ammo is loaded to higher chamber pressures than Remington or Winchester magnum rounds.
.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 6.5-300 Weatherby Magnum is a 6.5mm cartridge created by Weatherby in 2016 for the growing 6.5mm long ... When bullets with high ballistic coefficients are used ...
Left to right: .308 Win, .30-06, .300 Weatherby, .300 ICL Grizzly, .300 RUM.300 ICL Grizzly' is based on the .300 H&H Magnum, and indeed the two are so similar that .300 H&H ammunition can safely be fired through a rifle chambered in .300 ICL Grizzly, as can the ammunition of another .300 H&H-based cartridge, the .300 Weatherby Magnum. [25]
Compared to other production .30 caliber (7.62 mm) cartridges, only the .30-378 Weatherby Magnum surpasses the .300 Remington Ultra Magnum. Factory loaded .30-378 Weatherby Magnum ammunition has a 150–200 ft/s (46–61 m/s) velocity advantage over the .300 RUM cartridge with any given bullet weight. However, the .30-378 Weatherby Magnum is ...
7mm Weatherby Magnum.30-378 Weatherby Magnum.224 Weatherby Magnum.240 Weatherby Magnum.257 Weatherby Magnum.270 Weatherby Magnum.300 Weatherby Magnum; 6.5-300 Weatherby Magnum.338-378 Weatherby Magnum.340 Weatherby Magnum.375 Weatherby Magnum.378 Weatherby Magnum.416 Weatherby Magnum.460 Weatherby Magnum
The .300 Winchester Magnum has a case capacity of 93.8 grains. While providing ballistic performance nearly identical to that of the .300 Winchester Magnum, 300 WSM does this with about 14 grains less powder. The .300 WSM also head-spaces off of the case shoulder, versus the older .300 Winchester Magnum's belted head space design.
The .300 Win Mag remains the most popular .30 caliber magnum with American hunters, despite not being as fast as more powerful .300 Magnums such as the .300 Weatherby Magnum and .30-378 Weatherby Magnum as well as the newer .300 Remington Ultra Magnum, .300 Norma Magnum, .30 Nosler, and .300 PRC, though all of these must be chambered in a long ...