My Sako 85 Classic in 30-06 shows the ejection problem even WITHOUT a scope on it.
It is a problem on the bolt, where the extractor has little space to go against the center of the bolt face (the cut is too shallow).
It causes the extractor to not grab the base of the brass with enought force and at the middle of the extraction, when the brass clears the chamber, it just slips out of the extractor claw.
The only definitive solution I saw is to make the extractor cut on the face of the bolt a little deeper, so the extractor can actually grab with more force and pressure the brass until the ejector pushes it out of the action.
