I work at an Academy just north of these guys and we also use late model M67's for Corrections. Thus far (3 or so years now) we have had issues with strain screws unscrewing themselves but not much else. I do not recall if ours are two piece or one piece barrels at the moment. Our previous M15's lasted some 25+ years and had gosh knows how many rounds (I'd guess 100,000+rd each at least) through them with mostly zero drama until they became so worn that even new parts would not always get them back up and running right.

I'd guess that if I was ordering new DA revolvers today for long term Academy use (I am not the coordinator) I would go with Ruger GP100s in .38Spl and never look back. Elsewise S&W would have to do a Heck of a sales job on me.

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Run Fast, Bite Hard!