Way back when, Dad bought a Marlin 336 and one each for my brother and me. Mine was in 35 Rem. Dad and the brother went with fixed 4 power scopes, whereas I went with iron sights. I found that shooting at dusk was way tougher for me than for them. Eventually I added a 4 power, and my deer killing efficiency increased considerably. So, scope it, but more than 5 power is wasted on a 150 yard gun.