I have the same rifle as you describe with a Bushnell Banner 4X scope, post/crosshair. It really depends on the conditions you shoot. I hunted deer in Vermont and the longest shot was usually under 100 yards. The scope makes it easier to distinguish your target (horns on a deer) and the post makes it easy to see at dawn/dusk, in heavy brush. I have a basic heavy duty leather sling, adjustable of course.