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I run something like it in my Bushmaster.
Basically, the grooves allow the turbulence to escape in an orderly fashion around the bb at the end of the barrel. It's like a mega-crowning - it gives you some of the TK effect with almost none of the speed pickiness.
Basically, the grooves allow the turbulence to escape in an orderly fashion around the bb at the end of the barrel. It's like a mega-crowning - it gives you some of the TK effect with almost none of the speed pickiness.
