300 Ultra Mag ( 300 RUM ) AMMO FOR SALe

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What’s is 300 Remington Ultra Magnum?

The . 300 Remington Ultra Magnum is a member of the Remington Ultra Magnum cartridge family based on the .404 Jeffery via the Canadian Magnum cartridges. As these cartridges feature wider bodies than the belted magnums based on the .375 H&H case, these cartridges have greater case capacities than their corresponding full length belted Magnum cartridges such as the 7 mm Shooting Times Westerner, the .300 Weatherby Magnum, .340 Weatherby Magnum and the .375 Ackley Improved.

Origin and History of 300 Remington Ultra Magnum

In the early 1980s Aubrey White and Noburo Uno of North American Shooting Systems (NASS) based in British Columbia Canada began experimenting with the full length .404 Jeffery by reducing the taper and necking it down to various calibers such as 7 mm, .308, 311, 338, 9.3 mm and .375. These cartridges were known variously as the Canadian Magnum or the Imperial Magnums. Rifles were built on Remington Model 700 Long Actions and used McMillan stocks.

Performance Characteristics .300 Remington Ultra Magnum ammo

Cartridge	Criteria	Muzzle	100-yard (91 m)	200-yard (180 m)	300-yard (270 m)	400-yard (370 m)	500-yard (460 m)
Premier Scirocco Bonded 150 grains (9.7 g) PR300UM5[2]	Velocity	3,450 ft/s (1,050 m/s)	3,211 ft/s (979 m/s)	2,985 ft/s (910 m/s)	2,769 ft/s (844 m/s)	2,564 ft/s (782 m/s)	2,369 ft/s (722 m/s)
	Energy	3,964 ft⋅lbf (5,374 J)	3,434 ft⋅lbf (4,656 J)	2,967 ft⋅lbf (4,023 J)	2,554 ft⋅lbf (3,463 J)	2,190 ft⋅lbf (2,970 J)	1,869 ft⋅lbf (2,534 J)
	Bullet Drop	−1.5 in (−3.8 cm)	2.6 in (6.6 cm)	3.2 in (8.1 cm)	0 in (0 cm)	−7.8 in (−20 cm)	−20.9 in (−53 cm)
Premier Scirocco Bonded 180 grains (12 g) PR300UM3[2]	Velocity	3,250 ft/s (990 m/s)	3,051 ft/s (930 m/s)	2,860 ft/s (870 m/s)	2,677 ft/s (816 m/s)	2,502 ft/s (763 m/s)	2,334 ft/s (711 m/s)
	Energy	4,221 ft⋅lbf (5,723 J)	3,719 ft⋅lbf (5,042 J)	3,268 ft⋅lbf (4,431 J)	2,864 ft⋅lbf (3,883 J)	2,501 ft⋅lbf (3,391 J)	2,177 ft⋅lbf (2,952 J)
	Bullet Drop	−1.5 in (−3.8 cm)	2.9 in (7.4 cm)	3.6 in (9.1 cm)	0 in (0 cm)	−8.5 in (−22 cm)	−22.5 in (−57 cm)
Premier A-Frame 200 grains (13 g) RS300UM2[2]	Velocity	3,032 ft/s (924 m/s)	2,793 ft/s (851 m/s)	2,566 ft/s (782 m/s)	2,352 ft/s (717 m/s)	2,148 ft/s (655 m/s)	1,954 ft/s (596 m/s)
	Energy	4,082 ft⋅lbf (5,534 J)	3,464 ft⋅lbf (4,697 J)	2,924 ft⋅lbf (3,964 J)	2,456 ft⋅lbf (3,330 J)	2,049 ft⋅lbf (2,778 J)	1,695 ft⋅lbf (2,298 J)
	Bullet Drop	−1.5 in (−3.8 cm)	3.7 in (9.4 cm)	4.5 in (11 cm)	0 in (0 cm)	−10.8 in (−27 cm)	−29.2 in (−74 cm

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