Editing .30-06 Springfield (section)

===.30 M1 ball cartridge===
For these reasons, in 1926, the ordnance corps, after extensive testing of [[7.5×55mm Swiss#The GP 11 cartridge|7.5×55mm Swiss GP11]] projectiles provided by the Swiss, developed the .30 M1 ball cartridge loaded with a new [[Improved military rifle powder|improved military rifle (IMR) 1185]] propellant and {{convert|174|gr|2|adj=on}} bullet with a 9° boat-tail and an [[ogive]] of 7 [[Calibre length|calibers]] [[nose cone design|nose cone]] that had a higher [[ballistic coefficient]] of roughly 0.494 (G1 BC),<ref>{{cite web |url=https://www.snipercentral.com/m118.phtml |title=M118 History - Sniper Central |access-date=26 October 2014}}</ref><ref>{{cite web |url=http://www.cruffler.com/trivia-July99.html |title=Firearm Technical Trivia, July 1999 |first=Adam C. |last=Firestone |website=www.cruffler.com}}</ref> that achieved a muzzle velocity of {{convert|2647|ft/s|m/s|abbr=on}} and muzzle energy of {{Convert|2675|ftlbf|J|abbr=on}}.<ref name="Hatcher 1962 29">{{harvnb|Hatcher|1962|p=29}}</ref> This bullet further reduced [[air resistance]] in flight, resulting in less rapid downrange deceleration, less lateral drift caused by crosswinds, and significantly greater supersonic and maximum effective range from machine guns and rifles alike.<ref name="cgsc.edu">[http://www.cgsc.edu/carl/docrepository/FM23_10.pdf FM 23-10 ''Basic Field Manual: U.S. Rifle Caliber .30, M1903'', 20 September 1943 page 212] {{webarchive |url=https://web.archive.org/web/20130418083932/http://www.cgsc.edu/carl/docrepository/FM23_10.pdf |date=April 18, 2013 }}</ref> Additionally, a [[gilding metal]] jacket was developed that all but eliminated the metal fouling that plagued the earlier M1906 cartridge.
The loaded round weighed {{convert|420|gr}} and its maximum range was approximately {{convert|5500|yd|m|-1|abbr=on}}.<ref name="cgsc.edu"/> The maximum average pressure (MAP) was {{convert|48000|psi|MPa|2|abbr=on}}. The average target radius was specified to be not greater than {{convert|4.5|in|cm|0|abbr=on}} at {{convert|500|yd|m|0|abbr=on}} and not greater than {{convert|5.5|in|cm|0|abbr=on}} at {{convert|600|yd|m|0|abbr=on}} when fired from a Mann accuracy weapon.<ref name="auto">{{Cite web |url=https://books.google.com/books?id=msoIAQAAIAAJ&q=m2+link+.50&pg=PA9 |title=Technical Manual Small-Arms Ammunition, TM9-1990, U.S. War Department |access-date=20 February 2020 |date=23 May 1942}}</ref><ref>{{Cite web |url=http://www.odcmp.org/1001/mann_inc.asp |title=The CMP Mann Accuracy Devices |last1=Rutledge |first1=Steven T. |date=2001-07-27 |access-date=2023-02-11 |website=odcmp.org}}</ref>