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Old April 16, 2012, 08:14 AM   #4
Rifleman1776
Senior Member
 
Join Date: April 25, 2010
Location: Arkansas
Posts: 3,309
That's TV.
There have been, and still are, as many rifling styles as can be imagined. The theories on what style and twist rate is best are infinite.
In museums you will find both kind, deep, shallow, V, round, flat, etc.
Draw no conclusions from TV.
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