Gunsmithing Barrel question - What do I have exactly…

LRshooter6mm

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Minuteman
Oct 1, 2017
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I picked up this barrel from a prize table and am curious what the markings mean and what barrel I actually have. There was no description with it except Shilen 1:10 .308. Someone smarter than me please shed some light lol here is a couple pics with some dimensions.
 

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One of the markings could also be a lot indicator ... I'm not the best resource for this, but someone more knowledgeable will come along or you could likely do some searching on the subject.
 
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The 6 G is six groves to go with the 10 twist. S is stainless steel barrel.
XX is a match barrel but not a SM which is a select match barrel...slightly higher quality.
I always get tbe SM when ordering personally... but do not use many of their barrels these days...but the SM's are good barrels.
It should be a pretty good shooter.
 
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