I picked up an M1 Garand last week. At the range, I used reloads, some of which had been fired in a bolt action rifle. I shot 24 rounds loaded with 54 gr of Hodgdon 414, the bottom of load listing. When I examined the spent cases, I found that all twelve of the "FC 30-M1" cases had primers that had popped out a little. None of the other case types had the problem.
At home, I compared different headstamp 30-06 spent case weights, and found that the "FC 30-M1" cases weighed significantly more (8%) than other types. This suggests thicker case walls and lower internal volume. And perhaps higher pressure that would require lighter loads?
At home, I compared different headstamp 30-06 spent case weights, and found that the "FC 30-M1" cases weighed significantly more (8%) than other types. This suggests thicker case walls and lower internal volume. And perhaps higher pressure that would require lighter loads?
