I believe the M38 is one of the rarer versions of the Soviet variants, depending on the year of production. I'm not too well versed on other countries' models.
This is your one-stop shop of encyclopaedic Mosin info:
My Mosins are reasonably accurate with factory loads. But most of the fun of these rifles, for me, is the cheap surplus ammo that will sacrifice some accuracy
Proverb for Paranoids: The innocence of the Creatures is in inverse proportion to the immorality of the Master. -T. Pynchon