When I was 15 I shot a duck in the head at about 90 yds, offhand, with my Marlin 25 scoped with a Weaver D4. About .004 seconds after realizing I had hit the duck, I also realized that it was across the river from me. I ended up hiking a mile downriver to a bridge, then upriver to get my duck, followed by a two mile return trip. To be 15 again, when a 4 mile hike was no big deal.