Re: type 99 arisaka score
The bolt knob shouldn't be knurled--sounds like someone may have tried to sporterize it. The only bolt knobs I've ever seen are oval/egg shaped or cylindrical.
Gander Mountain is supposed to test fire all used weapons that they sell them, but Arisaka ammo is hard to find and expensive. Better check to see if it has been rechambered for a .30-06 or other cartridge.