Marlins are FANTASTIC rifles...some of the most reliable and most accurate you will ever run across...and oddly, the most inexpensive.
Marlin is the Kenwood of firearms...solid, dependable, work & sound better than you ever expected
Micro-groove barrels are one thing...finicky about what you feed them as Morris the Cat. You will likely have to try a couple of different manufacturer's bullets to find what yours likes the most. Your best friends will soon be a Micrometer so that you can measure the bullet width of the rounds you will put through it and a notepad to write down your group results.