I sat down to reload a bunch of .30-06 using the M2 military 150 gr FMJFB bullets I bought a while ago. Up until now, I’ve been shooting the 150 gr commercial FMJBT bullets. Here they are side by side.

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The commercial bullet FMJBT is on the left. Both are .308 but the ogive on the M2 is much different. Sierra’s specs indicate the overall length of the cartridge with the commercial bullet should be 3.250” while all the military surplus cartridges with the M2 bullet that I have from the 1950s all measure .075” longer at 3.325”.

Does anyone have the overall length specs for a cartridge with a M2 FMJFB bullet?