I am really interested in this problem and do hope someone can come up with and answer.

I do have a related question; the bolt kick-up that some rifles have, is that caused by the bolt handle resting on the action body (which I accept must contact - there's nowhere else to stop the bolt rotation)? Why do some lift and not others? Or am I just not noticing it so much? My uncle who was an armourer in Africa told me about it and said not to worry about it. He said some don't like it and that was all he said.