You would hope that your Korean ammunition is OK. Given the number of Garands we gave to the Koreans you would also assume that when originally reloaded, the pressures were appropriate for Garands.
I remember the “Blue Sky” Garands that came in from Korea in the 80’s. They were beat to pieces, evidence of firing with rocks in the barrels, etc.
I have picked up fired Korean 30-06 and the brass seemed fine and I reloaded some.
There is one thing you know about surplus ammunition, it was discarded because it was beyond its shelf life. So the stuff is old, you don’t know exactly why it was surplused, because there are a number of criteria for determining shelf life, but it failed at least one.
What you don’t know about the past history of surplus ammunition is a lot more than what you do.
Combustion pressures will rise after high temperature storage.
INVESTIGATION OF THE BALLISTIC AND CHEMICAL STABILITY OF 7.62MM AMMUNITION LOADED WITH BALL AND IMR PROPELLANT
Frankfort Arsenal 1962
3. Effects of Accelerated Storage Propellant and Primer Performance
To determine the effect of accelerated isothermal storage upon propellant and primer performance, sixty cartridges from each of lots E (WC 846) and G (R 1475) were removed from 150F storage after 26 and 42 weeks, respectively. The bullets were then removed from half the cartridges of each lot and from an equal number of each lot previously stored at 70F. The propellants were then interchanged, the bullets re-inserted, and the cases recrimped. Thus, four variations of stored components were obtained with each lot.
Chamber pressures yielded by ammunition incorporating these four variations were as follows. These values represent averages of 20 firings.
I believe hot storage over extended periods is the reason so many rifles have Kaboomed with Pakistani ammunition.
Incidentally, the Koreans are quite capable of producing good ammunition; due to insufficient industrial capacity in the United States, we are unable to supply the ammunition needs of our Troops in combat. The US military contracted with Korean firms to supply ammunition to our troops in Iraq and Afghanistan.
This is all well and good until the Chinese Navy cuts the sea lines.
We never learn, do we?