"I have been reloading for 41 years now, so i know a few tricks"??
Have you checked the OAL of your brass? Too short, gets pushed forward by the firing pin and you get light strikes OR FTF.
Me? Start there. KISS.
Too short, pull the bullets to a jam. That will hold the bullets against the bolt head. Once they go BANG, make sure you don't push the shoulders back 'too far' and end up with the same thing all over again.
You've got to start somewhere??
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