During WW2 there was a detachment of National Guard troops from Alaska that carried and used 30-30 rifles. They were used to infiltrate Attu and Kiska to scout out the Japanesewhich they did. There was also another group that was used to guard National Forests with 30-30 rifles. There were security people armed with 30-30 rifles protecting defense industries too. If I remember right they all used FMJ rounds. But there was nothing ever listed as far as executions having to use FMJ rounds that I have been able to find.