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This is a companion cartridge to the 26 and 28 Nosler and is aimed at giving magnum type performance on a standard length action on a rimless case.   

Charles Newton had an affinity for single shot rifles and did various experiments with cases like the 405 Winchester, Sharps cases as well as the 40-110 and 45-125 WCF cases. The rimless 30 Newton was based on a case with 404 Jeffery capacity and this rimmed version...

NEWTON ARMS

   The .30 Kurz is made by shortening the .30-06 or .308 Winchester to 1.290 inches. This produces a short cartridge very similar to the German 7,92 Kurz assault rifle cartridge of WWII. The idea originated in the 1960's and there are other versions of this...

   One of a series of Jamison cartridges based on the 404 Jeffery

   Based on the 9.3x64 case, in an attempt to achieve better ballistics in a standard length action

   Based on a shortened 30-06 case by Roy Dunlap. Intended as a match cartridge

                     Based on the 7mm BR case necked to .30cal.