Nosler Ammo 7mm Remington Ultra Magnum 175Gr Accubond LR 20 Rounds Based on the non-belted, rebated-rim 404 Jeffrey case, the 7mm RUM is without a doubt the highest performing .284 caliber cartridge commercially loaded today. As with any of the “super magnum” sized cartridges that are necked down to smaller calibers, slow powders will work best. Periodic case neck annealing may be necessary to ensure a good seal in the chamber. Signs of a poor seal include excessive blackening beyond the neck and/or case collapsing. IMR 7828 is an excellent powder choice for this cartridge, yielding the most consistent results across all bullet weights.
Manufacturer: Nosler Model: 60120
The information below comes from our Gun Caliber Dictionary and is for
general reference only. It does not describe the specifications of this
particular item.
Introduced in 2000, the 7mm Remington Ultra Magnum (RUM) is the fastest 7mm commercial cartridge. Based on the fat, unbelted 404 Jeffery case, it is a full-length magnum (2.850-inch) case requiring a 375 H&H-length action. The 7mm RUM averages about 200 fps faster than the 7mm Remington Magnum with all bullet weights; and about 100 fps faster than the 7mm Shooting Times Westerner. It is thus extremely flat-shooting, but with less considerably less recoil than a .30-caliber with similar velocity. Perhaps surprisingly, the 7mm RUM has not become popular and is currently offered primarily by Remington in both rifles and ammunition.
—
Craig Boddington
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