Last weekend at my campsite, there were some 4" logs in the fire pit. All I had was an SAK and a Mora. It was warm, so I didn't need a fire, but I thought about what tool would be best to split those suckers open for a nice fire. With some time and effort, I could have made wedges and used the Mora. If I had my hatchet, 3 blows along the side should do it. A 3/4 size axe should take care of it with one blow. My true flight thrower could probably baton through it with some effort. So, it comes down to how much time you want to spend doing fire prep vs. weight you want to carry. If I didn't want to mess around, I think a 3/4 axe would be the ticket.