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Old March 15, 2009, 09:17 AM   #23
Senior Member
Join Date: December 20, 2007
Posts: 180
I've always heard that 03's above serial number 800,000 (Springfield) and 286,506 (Rock Island) were double heat treated and hence considered "safe".
I put safe in quotes, as even late Springfield receivers have failed, as have Mauser, Arisaka, Enfield, Carcano, and Mosin Nagant receivers.
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