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300 imperial magnum what is it ??

 
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  #1  
Old 12-10-2011, 12:07 PM
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300 imperial magnum what is it ??

i see one for sale and don't know anything about it...is it a wildcat/ or factory.. /are dies available or where can i find more info, this rifle is a sako m995 trg-s , and the price is right...THANKS,Denny

Last edited by denny r; 12-10-2011 at 06:37 PM. Reason: need to do a better job explaining myself
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Old 12-10-2011, 01:23 PM
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Re: 300 imperial magnum what is it ??

Quote:
Originally Posted by denny r View Post
i see one for sale and don't know anything about it...thanks denny
The imperial is essentially necked down and formed from a full length 404 Jeffery case. The imperial precedes the RUM and is the idea in which the RUM was based. Performance will be comparable with the 300 RUM even though powder capacities may be slightly different between the two chamberings.
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Old 12-10-2011, 05:51 PM
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Re: 300 imperial magnum what is it ??

Exactly correct. I've had a 338 Imperial since before the Ultra Mags were introduced. They are excellent cartridges. I now use 375 Ultra Mag cases to form the 338 Imperial.
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Old 12-10-2011, 06:40 PM
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Re: 300 imperial magnum what is it ??

where can i find more info...i didn't explain myself first time around..did norma make this one?
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Old 12-10-2011, 07:29 PM
436 436 is offline
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Re: 300 imperial magnum what is it ??

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Originally Posted by denny r View Post
where can i find more info...i didn't explain myself first time around..did norma make this one?
From an old friend of mine... Ret. RCMP Aubrey White the designer of the cartridge... it's a very fine design in any of its many calibers; Aubrey was way ahead of the times with this one.

Here's his email; rifle@persona.ca

North American Shooting System
11 Rose Place RR 1
Osoyoos, BC VOH 1V1
(250) 495-3131

Cheer’s
436

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Old 12-10-2011, 07:30 PM
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Re: 300 imperial magnum what is it ??

"Origin & History

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 Macmillan stocks. Cartridges were fire formed from .404 Jeffery cases with the rim turned down, taper reduced and featured sharp shoulders.

Both Remington and Dakota Arms purchased the formed brass designed by Noburo Uno for use in their own experimentation and cartridge development. In 1999 Remington released the first of a series of cartridges virtually identical to the Canadian Magnum cartridges which featured a slightly wider body, increased taper, and shallower shoulders and named it the .300 Remington Ultra Magnum. Dakota too released their own version of the cartridge but chose not to turn down the rim and shortened the case to work in a standard length action. Remington would go on to design their own shortened versions of the Ultra Magnum cartridge which they were to call the Remington Short Action Ultra Magnum or RSAUM for short."

Here's a link. I used to own and shoot a .338 Imperial Magnum. That rifle is now a .338 Edge, which is the .338 Imperial with the shoulder pushed further forward by about 0.020".

.300 Remington Ultra Magnum - Wikipedia, the free encyclopedia
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Old 12-11-2011, 09:47 AM
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Re: 300 imperial magnum what is it ??

thank you, guys for all your help!!!!! just what i needed to know..denny
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