My wife and me took our 8 year old grandson out to camp, fish and grouse hunt. Had a bunch of fun. I spot a small black bear close to the road and my grandson is excited and I decide I will shoot it and make his trip even more memorable. I grab the peep sighted 45-70 Marlin and get to about 40 yards from the black bear and I'm pretty sure he is aware something is up. He is in the bushes on a steep incline and I have a broad side view of the top half of his body. I have to stand there and take the shot which I know I can do. The hammer drops and the front post is still where it belongs when the dread "click" happens and I have a misfire, no problem and I chamber another round and recompose my self and bang, bear disappears. I go to where he was and after an hour or so of grid searching thick brush and dark timber I find no blood, no bear, nothing. I missed what I think should of been and easy shot. My poor grandson was so excited and I explained to him that it was a good thing the bear was not wounded and lost. So back to the range to try and determine why that 400 grain Kodiak bullet did not find it's mark. I really hope my sights are off!