Interesting that you had three OOB events and broke three hammers at 3 thousand rounds... What other fictitious series of 3 have you had........
Interestingly enough, I have over 20,000 rounds on one of my RRA National Match triggers, and the only thing I have done to it is replace the hammer spring and disconnector spring, as I fell below the minimum 4.5lb trigger pull required for Service Rifle as my springs aged (tuned to be 4.5lbs when new). Another RRA Varmint has trigger has around 8,000 on it currently. One of my Geisseles NM 2 stage triggers is over 15,000 rounds over it, with no hiccups. I install a handful of these triggers every year still, if they were breaking for the high volume shooters who buy from/through me, I’d certainly have heard about it. Many of these guys are pumping out 3,000 rounds in a month or so.