to be clear, the EXTRACTOR is what pulls the empties out of the chamber
the EJECTOR is what kicks the empties out of the rifle.
In the Model 98, the EXTRACTOR is on the bolt, the EJECTOR is on the receiver, part of the bolt stop assy.
The extractor should be able to turn smoothly on the bolt body. IT may feel a bit stiff but there should be no binding.
Worn parts, damaged parts, incorrect assembly, incorrect parts, or dirt & crud can cause binding.
As to single loading, there is more than just the angle of the extractor claw. There is also a small relief cut in the receiver, to allow the claw the clearance to snap over the case rim. Not all mod 98s have this clearance. IF you force the claw over the rim, in a rifle without the clearance cut, damage can result.
(and no, don't ask me which ones do, or don't, I no longer remember with certainty, only that some do, and some don't. )
If you need to single load a 98 without using the magazine, I would recommend hooking the rim underneath the claw, and pivoting /sliding the round into position against the bolt face, then slowly moving the bolt forward chambering the round or empty case. This avoids any need for the claw to snap over the rim.