M38 Headspace question

[vintage hunter]

old Yugoslavian ammo.

The green sealer and NNY head stamp suggests this is Serbian or Bosnian made ammo imported/sold by Jay Hanson, owner of the Hanson Ammunition Company, during the early to mid 1990's prior to the start up of the Bosnian War in '95. It was very good ammo. It's the same as the current PRVI brand. Some of the ammo sold under the Hanson name was made by IMI in Israel and IIRC it had red sealer and 1K OR IK head stamps.
As Jim said there's nothing wrong with the ammo. And if the bolt and receiver numbers match then in all probability there's nothing wrong with the rifle either.
I used to work part time at a gun shop in the early 90's when the Swede Mausers were plentiful and still being imported in. They were big sellers and it was hard at times to keep them in stock. I've handled hundreds while inspecting and checking head space prior to putting them out for sale and not once do remember finding one that failed to head space within spec. Some, mostly the M38's, appeared to be in like new condition. There was even a couple M41 snipers sans scope, base and mounts mixed in. The sad part is most were sporterized to some degree at the buyers request.