Wouldn't hold my breath based on my experiences and I paid more than 3800 for mine and in the end paid another 1100 to another proper gunsmith to actually repair it.
Had a similar issue to the one you have.
SAUM and RUM cases have bugger all taper so primary extraction matters!! I now know more about primary extraction and M700 actions than I ever wanted too
Having said that since it was fixed I have fired another 600 rounds with exactly ..........................zero issues with extracting fired cases.
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