I blanked a primer in my Stiller Tac 30 6.5x47 a while back and it wouldnt cock,,took apart and cleaned and it would work sometimes and then just quit,,when I took it apart the 2nd time pieces fell out different than the first time,,more than likely the sear was cracked the first time and then broke with use ,,
I sent it in to Jewell and they fixed the trigger and shipped it back for 50$$,,
trigger is near 20 years old and has been on 7-8 different rifles and somewhere around 25K rounds,,
I blanked a primer on a 204 about 10 years ago and it didnt seem to hurt it but I did have to clean and readjust it then and when I blanked the primer on the 6.5 the sear broke,,
I didnt have any trouble with Jewells customer service at all,,just sent it in and they fixed it,,but if you ever blank a primer or have case head seperation and the pressure releases through the bolt and trigger group it is very possible something is cracked at least and probably broken,,
I think the ones with a safety are more prone to break than the BR models without a safety,,
pic of mine with broken sear,
