Sorry to be so late in my reply to the last three posts. Just saw them a couple days ago and I've been working on that bolt. You are definitely correct that the bolt was not camming up into place in the receiver. I used some JP Weld to repair the broken back part of the notch in the old bolt JUST so I could test the relationship between it and the action bar. The old bolt cams up into place nicely and when the action bar is brought to the rear, the bolt uncams and moves back. The new bolt will fit into the cam area just fine without the action bar in place. However, with the action bar in place, the rear of the action bar has to be wiggled around to get the bolt to cam up. But, when the bolt cams up, it is nearly impossible to bring the action bar rearward without quite a bit of wiggling the rear of the action bar to get the bolt to uncam. I have been polishing on the new bolt but have not yet tried dressing the notch. The polishing seems to have helped a little. I don't really know what I'm doing to say the least but at least thanks to you guys, I'm on the right track. It seems to me its all in the relationship to the mating of the action bar and the notch in the bolt. The lug on the action bar is a little worn but seems to fit well into the notch on the bolt. Something still is off and I haven't figured it out yet. If you see anything in this reply that reveals a direction, etc. let me know. I am thinking of purchasing a new action bar as well. I love this piece and I want desperately to fix it.