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Old January 9, 2013, 01:45 AM   #3
Join Date: January 8, 2013
Location: Colorado
Posts: 19
Chroming on T99s was standard. Japs were ahead of their time on that. A response to the tropical climate and corrosive ammo. Difficult to measure accurately but the land a groove marks on the slug are almost inperceptible. Recently slugged my old Enfield, Mauser, and M-Naggant. No problem reading the slug from any of them. Clearly visible land a groove marks, even enough to feel with a finger nail if you're careful. Not the case with the Arisaka. Need a magnifying glass to see the very slight marks on the slug. If you say 004" would be a standard measurement, then these would be like .001" or .0005", yet they still effectively stabilize the bullets which punch nice round holes in paper at 50 yards.
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