| 词条 | 7mm Remington Ultra Magnum |
| 释义 |
|name= 7mm Remington Ultra Magnum |image= |caption= |origin= United States |type= Rifle |service= |used_by= |wars= |designer= Remington |design_date=2002 |manufacturer= |production_date= |number= |variants= |is_SI_specs= |parent=.300 Remington Ultra Magnum |case_type=Beltless, rebated, bottleneck |bullet=.284 |neck=.317 |shoulder=.5250 |base=.5500 |rim_dia=.532 |case_length=2.850 capacity 108.1 gr. |length=3.600 |rifling=1-9 1/4" |primer=Large rifle magnum |is_SI_ballistics= |bw1=140 |btype1=PSP Bonded |vel1=3425 |en1=3646 |bw2=150 |btype2=PSP Bonded |vel2=3325 |en2=3682 |bw3=175 |btype3=PSP A-Frame |vel3=3025 |en3=3555 |test_barrel_length=26" }} The 7mm Remington Ultra Magnum or 7mm RUM is a 7mm rifle cartridge introduced by Remington Arms in 2001. OverviewThe 7mm RUM was created using the .404 Jeffery case {{Citation needed|date=December 2018}}which was also used to develop the .375 RUM .300 RUM, and .338 RUM {{Citation needed|date=December 2018}}. By necking down the .300 RUM to suit the .284 or 7mm projectile, Remington produced a non-belted case with a head diameter that is somewhat larger than belt diameter of original belted numbers. The resulting case has significantly more capacity than any conventional belted magnum. Compared to the 7mm Remington Magnum, top 7mm RUM loads deliver 25% more energy at 300 yards.{{Citation needed|date=September 2010}} Such performance demands a price and in this case, that is a large muzzle blast, sharp recoil and short barrel life.[1] The 7mm Ultra Magnum boasts the largest case of any commercial 7mm cartridge. See also
References1. ^http://www.ballisticstudies.com/Knowledgebase/7mm+Remington+Ultra+Magnum.html {{Refimprove|date=September 2014}}{{Remington Cartridges Firearms}}{{DEFAULTSORT:7mm Remington Ultra Magnum}}{{ammo-stub}} 2 : Pistol and rifle cartridges|Remington Ultra Magnum rifle cartridges |
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