This innocent looking cartridge blew a Garand in about five pieces. I did the malfunction investigation on it and luckily had all the evidence.
Rifle was built up for match shooting and owner went out and was zeroing rifle first time at the range and this failure occurred on the 7th round fired.
I obtained all the previously fired cases and headstamp indicates they were loaded in 1954 by Kynoch in England.
I gaged all the fired cases and all cases indicated correct headspace on the rifle. All were factory loaded. Note no sign of excessive pressure on primer.
Failure was charged to a "soft head" indicating the case likely went through neck/shoulder annealing upside down so the case head was softened up and not the neck shoulder.
Shooter was very lucky.