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.30-338 Winchester Magnum
 
 

This cartridge was developed specifically for use in 1000 yard benchrest competition. It was created by simply necking the 338 Winchester Magnum to 30 caliber and almost exactly duplicates the 308 Norma Magnum (Norma's commercial offering has slightly less case taper and is slightly longer). The 30-338 Winchester Magnum fills a void in Winchester's Magnum line, created when Winchester introduced the 300 Magnum. The 264 Winchester Magnum, 338 Winchester Magnum, and 458 Winchester Magnum all share a 2.5 inch case length. Evidently to avoid direct competition with existing 308 Norma Magnum and to better compete with the well established, and substantially longer, 300 Weatherby Magnum, Winchester opted to increase case length and push the shoulder forward on their new 30 caliber magnum (actual usable capacity increase was marginal). The Wildcat 30-338 is likely exactly what Winchester would have offered had Norma not beaten them to the punch. Ballistics are very similar to the 300 Winchester Magnum, despite the slight reduction in powder capacity. Compared to that commercial chambering, a slightly longer case neck provides superior purchase for longer bullets. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.

   
 
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There is no printed reloading manual created for this caliber. There will be created a Wire-O booklet of all calibers with at least 60 loads present.
Click here to see in which calibers this reloading manual is available.

 

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reloadersnest Complete Reloading Manual
The Complete Reloading Manual is a compilation based on all rifle calibers with at least one load from this site.
The book contains 311 calibers and 9557 loads. 549 pages in 8x5 inch Perfect-Bound binding.
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Show all 14 loads

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Not yet verified user loads  
ID: Bullet weight: Bullet name: Powder:  
180 grs
Barnes TSX
Hodgdon US869
190 grs
Hornady BTSP
IMR 7828
155 grs
Berger
R 19
210 grs
berger
hodgen 4831 sc
180 grs
Nosler Ballistic Tip
IMR 7828
208 grs
AMAX
Reloder 22
190 grs
Hornady
H4831
190 grs
Hornady BTSP
H4831
190 grs
Nosler Custom Competition
H-1000
 
   
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