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Old July 19, 2013, 04:11 AM   #11
Noreaster
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Join Date: January 30, 2011
Location: New England
Posts: 1,449
There was a great write up on using bimetal bullets in ar15s and premature wearing of the rifling. I don't remember the name of the article but maybe you can find it. The author fired steel ammo and winchester through several Bushmasters and the steel bullets caused allot of wear on the barrels.
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