Perhaps this has been posted elsewhere, but if not…this is definitely worth a close read/study.
It’s hard to take this test seriously when the author fails in the first paragraph. The author states the 55 grain 5.56 is SS-109 and that the M855 cartridge has a 63 grain bullet. SS-109 is the designation for the 62 grain bullet used in the M855 cartridge.
What do details matter when dealing with data anyway? :sarcastic:
Those numbers were really low for M855 as well, although there is batch variation.
2920fps is the book average for 14.5" barrel M855 from the M4. You can see it vary below and above that, but 2700fps is really slow for a 14.5" barrel.
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