I put a JMT Saber trigger into my AR and ran 180 rounds of Silver Bear. Four or five of the rounds failed to fire, with indentation on the primer indicating light strikes. I emailed JMT about this last week via the website, but I haven't gotten a response. 1. Is this normal for JMT triggers? Reading reviews now on several sights, it does seem like multiple folks have had light strike issues with these triggers on hard primers. 2. Is it normal for JMT to not respond the users of its products who have problems?