it looks ok, all autoloaders will have different wear in that area. try to clean the bore well with a good copper solvent. make sure no copper has fouled bore. i wouldn't polish it at all. if you do you may find your accuracy is worse and have to get a new barrel. mine has the same marks and is...
i contacted ruger cs over this problem also. got the same response as bearcat. i've smithed for 25 years and retired. not ruger certif but found the problem with dykem. it is a timing issue. on many custom 1911s that i worked on, customers installed there own barrels. i found locking lugs peened...