The newer rifles seem to have better machining . I have an early heavy barrel and the bolt is very rough and stiff after lots of use and lubed well . I recently took the bolt apart and polished all mating surfaces . It made a considerable difference. The original surfaces were very rough . A couple of my friends have the new 1 in 8 twist versions and the bolts are a lot better than mine and also shoot a lot better at 100 yards .
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