thanks for the suggestions. the headspace is very tight. bolt is tight with factory rounds, so I doubt headspace is an issue. I tightened the barrel down on a go guage.

i adjusted the firing pin protrusion a little and fired 5 more and all went bang. checked those that did not and there was powder. I threw those in the pond b/c I am scared of them going off. Maybe it is fixed now. Those last 5 I put in a 0.6 in group at 100. My goal is 1/2 in groups. Can't wait to get started on my next build. Thanks for all the help guys.