I am thinking about rebarreling my remington 3006 to a 7 rem mag. I was speaking to a gunsmith about it and he wasn't that keen on the idea because he had heard about problems with the sako extractor coming off and hitting the shooter. He was saying that the rotating sleeve on a sako bolt is to block a gap that stops the extractor on a sako bolt coming back and hitting the shooter. Anyone else heard of this problem? Stu.