I have a Remington 700 that was originally a 7mm RUM which I used the action for a 338 edge build. The extractor sometimes slips off and leaves the empty in the chamber. If I cycle the bolt a few more times it will eventually catch and pull out the case. There is no pattern. Sometimes it works and sometimes it doesn't. The bolt lift is always easy and my velocities are in line with what everyone else reports they are getting so I know excessive pressure is not the issue. My question is should I just replace it with a new factory extractor or have a smith install a Sako type extractor? I don't want to waste time and money if the factory extractor will not permanently fix this issue, but it will be much cheaper than the Sako.