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Old April 19, 2016, 03:25 PM   #2
mete
Senior Member
 
Join Date: June 14, 2004
Location: NY State
Posts: 6,575
Temperature of the bluing solution has some effect and the rest is the difference in the composition of the steel. Even some of the more modern guns such as the HK P7 have purple. Some like it , some don't !!
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