that looks to me like a huge amount of wear for a SiG...does your SiG have a braided recoil spring???...perhaps the marks on a SiG barrel are from the recoil spring being braided instead of a regular coil spring...
...I will say that my P245 has a flat recoil spring and the wear on the barrel is similar to the wear on my braided spring SiG barrels...
...you might have something with lube as well...anywhere metal meets metal, needs some kind of lube...with all the reports of people buying pistols and then doing their own reliability reports (no cleaning, no lube, over pressure cartridges) I've always wondered...who buys these pistols when the tester is done with it???
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