PRESSURE TESTING OF LC 72 .30-06 AMMUNITION

As a result of some customer concerns as to the reported high gas-port pressure of Lake City 72 .30-06 ammunition and suitability for use in the M1 Garand, the CMP contracted with H.P. White Laboratory, INC. to conduct Chamber and Port pressure tests of a sample of this ammo.  Conclusions made by H.P. White were:

Chamber Pressure - The average peak chamber pressure of the Lake City Arsenal, Caliber .30-06 ammunition, though uncorrected for the material of the cartridge cases, was well within the safe maximum pressure recommended by Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) and was essentially identical to the average peak chamber pressure of the SAAMI reference ammunition.

Port Pressure - The average gas-port pressure of the Lake City Arsenal, Caliber .30-06 ammunition in each of the three improvised gas-port test barrels, was less than comparable firings of the SAAMI Reference ammunition. When compared with their respective, peak chamber pressures, the Lake City ammunition lost pressure more rapidly between the chamber and gas-port than did the SAAMI Reference ammunition which supports the assumption that the burning rate of the Lake City Arsenal, Caliber .30-06 Springfield ammunition may be faster than the ammunition loaded to SAAMI Standards.

Bullet Velocities - The bullet velocities of the Lake City ammunition were slightly lower than the SAAMI recommended minimum for this weight of bullet (150 grain).

TEST REPORT PRESSURE TESTING OF A SAMPLING OF LAKE CITY, .30.06 SPRINGFIELD AMMUNITION

TEST REPORT PRESSURE TESTING OF A SECOND SAMPLING OF LAKE CITY, .30-06 SPRINGFIELD AMMUNITION

Test Report Cover Sheet Sample 2	Introduction Page 1
Conclusions Page 2	Gas-Port Pressure Test Page 5