Editing .30-06 Springfield (section)

===Cartridge, caliber .30, ball, M2===
Wartime surplus totaled over two billion rounds of ammunition. Army regulations called for training use of the oldest ammunition first. As a result, the older .30-06 ammunition was expended for training; stocks of .30 M1 ball ammunition were allowed to slowly grow until all of the older M1906 ammunition had been fired. By 1936, it was discovered that the maximum range of the .30 M1 ball ammunition with its boat-tailed spitzer bullets was beyond the safety limitations of many military firing ranges. An emergency order was made to manufacture quantities of ammunition that matched the external ballistics of the earlier M1906 cartridge as soon as possible. A new cartridge was developed in 1938 that was essentially a duplicate of the old M1906 round, but loaded with [[Improved military rifle powder#IMR #4895|IMR 4895]] propellant and a new flat-based bullet that had a gilding metal jacket and a different lead alloy, and weighed {{convert|152|gr|2}} instead of {{convert|150|gr|2}}. This 1938 pattern cartridge, the cartridge, caliber .30, ball, M2, achieved a muzzle velocity of {{convert|2805|ft/s|m/s|abbr=on}} and muzzle energy of {{Convert|2656|ftlbf|J|abbr=on}}.<ref name="Hatcher 1962 29"/> The loaded round weighed {{convert|416|gr}} and its maximum range was approximately {{convert|3450|yd|m|-1|abbr=on}}.<ref name="cgsc.edu"/> The MAP was {{convert|50000|psi|MPa|2|abbr=on}} by copper crusher (equivalent to the SAAMI CUP unit). The average target radius was specified to be not greater than {{convert|6.5|in|cm|1|abbr=on}} at {{convert|500|yd|m|0|abbr=on}} and not greater than {{convert|7.5|in|cm|1|abbr=on}} at {{convert|600|yd|m|0|abbr=on}}.<ref name="auto"/>