Those early Miroku rifles are way ahead of the present day models in allround quality. The triggers on those rifles are good hunting triggers. Be mindful of when sighting in, it's a hunting rifle with a light barrel, keep your groups to 3 shots, after that they begin to open up due to the barrel heating and crawling around a bit.
Best accuracy seems to come when the forearm attaching bolt is tightened just as tight as you can get it.
Be mindful of the magazine , they are stamped and staked, and as such if you drop one on cold frozen ground it may knock the thing out of alignment a tiny bit and create some feeding issues.
Those early Miroku's seem to prefer Remington brass.
Keep in mind the 358 generates a lot of horsepower going in both directions, this is a light rifle and recoil may be a bit on the pesky side.
Don't worry about removing the bolt, a bit of brake cleaner spray inside the action once a year, a light coat of lubricant, and a good bore guide to protect the muzzle while cleaning and that rifle will give you many good years of service. (At least the ones that live here have served well for 30 someodd years)