.30 Newton

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.30 Newton
Place of originUnited States
Production history
DesignerCharles Newton
Parent case11.2x72 Schuler
Case typeRimless
Bullet diameter.308 in (7.8 mm)
Neck diameter.340 in (8.6 mm)
Shoulder diameter.491 in (12.5 mm)
Base diameter.523 in (13.3 mm)
Rim diameter.525 in (13.3 mm)
Case length2.52 in (64 mm)
Overall length3.35 in (85 mm)
Case capacity89.0 gr. water
Rifling twist10 to 12
Primer typelarge rifle
Ballistic performance
Bullet mass/type Velocity Energy
150 gr (10 g) 3,208 ft/s (978 m/s) 3,445 ft⋅lbf (4,671 J)
172 gr (11 g) 3,000 ft/s (910 m/s) 3,440 ft⋅lbf (4,660 J)
225 gr (15 g) 2,610 ft/s (800 m/s) 3,470 ft⋅lbf (4,700 J)
Source(s): Newton Arms Company Catalog. 14th Edition: 1920. IN "Cartridges of the World" Frank C. Barnes, 3rd Edition: 1972.

The .30 Newton cartridge was designed by Charles Newton, based on a German caliber of the period, the 11.2x72 Schuler.

Newton originally called the cartridge the 30 Adolph Express after Fred Adolph, a well known immigrant gunsmith from Germany at the time, who had proposed the idea of necking rimless German cartridges down to produce a high velocity hunting cartridge. During Newton's period of cartridge and rifle design, the only rimless American cartridge was the smaller 30/06. When Newton later began manufacturing and marketing the ammunition for his cartridges and line of rifles, he renamed it the 30 Newton.

The Newton Arms Company was the only manufacturer of commercial rifles chambered for this cartridge. It should not be confused with the .30 Belted Newton (a.k.a. .30-338), which is a different cartridge not designed by Charles Newton. Although suitable for any large North American game, it is an obsolete round no longer manufactured. Before World War II, loaded cartridges were once offered by Western Cartridge Company. Small runs of 30 Newton brass are occasionally made by Jamison Brass and Roberson Brass. Cases for 30 Newton can be easily made from .375 Ruger as they are very similar other than the caliber of the case neck; so much so that many assume Ruger based their cartridge on the 30 Newton case. 8x68S brass can also be used.

See also[edit]



  • Barnes, Frank C. Cartridges of the World. 3rd Edition: 1972.
  • http://www.reloadersnest.com/frontpage.asp?CaliberID=182
  • http://www.thefiringline.com/forums/showthread.php?t=238143
  • Charles Newton: Father of High Velocity. Jennings. 1985. ASIN B00147N8N4.
  • https://www.rccbrass.com/product/30-newton/