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Old April 10, 2013, 10:50 AM   #16
James K
Join Date: March 17, 1999
Posts: 24,139
There was at one time a lot of fuss about the those rifles with two-groove barrels. Then experience and testing showed that not only did the two-groove barrels shoot as well as the four or six groove ones, but quite often shot better.

(Later, the Army went back to four groove barrels because they were less subject to erosion than the two-groove.)

Jim K
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