I've been using a brass scraper and bronze brushes to keep the comp ports clean. That hasn't been a problem, even with lead rounds.
From now on I'll be bringing an Allen wrench and checking the tightness, especially after warmer 44 magnum. It must be the power of the 44's recoil, because shooting pretty warm 357 loads (125 jhp over 16.5 of 2400 or 158 LSWC over 14.5 of 2400) in the 627 did not shake it loose. And I put hundreds of magnums through it one day, no problem. An N frame shooting 357 magnum really soaks up the recoil!
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