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2damnold4this · June 4, 2014, 10:30 AM

Brian, that's interesting. It seems like I read in the latest issue of American Rifleman, in the article on the new m855a1 ammunition, that a 1/8 or 1/9 twist was more accurate than 1/7 for both m855 and the longer m855a1.

edit to add: The article stated that the only reason 1/7 was selected was to stabilize tracers.

June 4, 2014, 10:30 AM	#8
2damnold4this Senior Member Join Date: August 12, 2009 Location: Athens, Georgia Posts: 2,526	Brian, that's interesting. It seems like I read in the latest issue of American Rifleman, in the article on the new m855a1 ammunition, that a 1/8 or 1/9 twist was more accurate than 1/7 for both m855 and the longer m855a1. edit to add: The article stated that the only reason 1/7 was selected was to stabilize tracers.