Talk:.300 Remington Ultra Magnum

message: A common misconception is that cartridge (powder) efficiency or bore to cartridge capacity is lineal or proportionate. That is, if I use 10 percent more powder I should get 10 percent more velocity and/or muzzle energy. This is incorrect and will never happen between two separate cartridges of differing, bore, case geometry or capacity (all other things being equal).
The reason is because a 10 percent increases in powder is a 10 percent increase in energy. Energy is not proportionate like force. Energy is a function of the square; v2. The square root of 10 is 3.2. Therefore a 10 percent increase in powder will tend to support a 3 percent increase in muzzle velocity. The muzzle energy is dependant on the weight of the bullet; the greater the weight the greater the percentage of increases in muzzle energy.
Now couple that with the fact the .300 RUM operates at a high mean chamber pressure than the .30-378 Weatherby Mag (65,000 and 63,800 PSI respectively) and on paper there is virtual no difference between the two cartridges.Greg Glover (talk) 01:14, 20 February 2008 (UTC)
thread_title:  Efficiency 

message: I have a doubt: Is .300 Remington Ultra Magnum is used by sniper rifle? If yes, by what army?Agre22 (talk) 15:51, 13 October 2009 (UTC)
replies: text: not been used in any wars. Removing the service history non-information. DeusImperator (talk) 04:00, 28 October 2013 (UTC)
thread_title: .300 Remington Ultra Magnum is used by sniper rifle?

message: After reviewing this article, I have removed the stub rating and pushed it directly to B. -Deathsythe (talk) 18:40, 26 April 2011 (UTC)
thread_title:  Article Classification 

message: During several automated bot runs the following external link was found to be unavailable. Please check if the link is in fact down and fix or remove it in that case!
* http://www.accuratepowder.com/data/PerCaliber2Guide/Rifle/Standarddata(Rifle)/308Cal(7.82mm)/300%20RUM%20Remington%20Ultra%20Magnum%20pages%20272%20to%20275.pdf
** In .300 Remington Ultra Magnum on 2011-05-20 21:36:24, 404 Not Found
** In .300 Remington Ultra Magnum on 2011-06-20 03:03:04, 404 Not Found
--JeffGBot (talk) 03:03, 20 June 2011 (UTC)
thread_title:  Dead link 

message: "Among commercially-produced .30-caliber rifle chamberings, The .300 Remington Ultra Magnum is third to the .30-378 Weatherby Magnum and the Lazzeroni 7.82 Warbird in cartridge-case capacity, the Warbird being the fastest and "the best as well""
The Lazzeroni cartridges are obscure proprietary cartridges with little adoption among sportsmen. They're not notable enough to feature in this article, especially not with a silly statement like "the best as well" attached. I've removed the reference. Bananabananabanana (talk) 19:55, 22 April 2012 (UTC)
thread_title: Advertising for obscure proprietary cartridge

message: As somewhat of a historian I would like to keep the pedigree of the RUM cartridges as it is. The information is accurate the issue here is citing information which currently is only found in blogs and forums which I do not want to cite. Yes I know everyone and their dog can create a blog and forum knowledge is no knowledge at all. These is base on a periodical a while ago and an first hand interview. Every cartridge has a history to tell. For example, an interview with Arthur Alphin provided the history for the .458 Lott "Napkin in a diner". DeusImperator (talk) 03:57, 28 October 2013 (UTC)
thread_title:  Cartridge History 

message: The .300 Remington Ultra Mag is described as "...a 7.62mm (.300 inch) caliber...." but, as indicated in the chart, and as with all 30 caliber rifle cartridges, the bullet diameter is .308 (7.82mm), although at least 2 "30 caliber" rifles use a bullet diameter of .308-.310 (7.62x39M43) or .308-.312 (32-20 Winchester).  It might be useful to point out that 7.62mm IS equal to .300 caliber, but "30 caliber" is a marketing tool more so than an accurate caliber designation.  Cdoc42 (talk) 15:22, 30 August 2015 (UTC)
thread_title:  caliber designation