I posted this picture on my adventure challenge. I took this after I walked up on her at six paces!
My son is going to use my 300 Weatherby Accumark with 180grn Noslers. He's proved himself competent under pressure with bears in Idaho, Montana and Alaska. He shot a wounded, charging bear and turned and looked at us like "what? why are you guys running? wern't nothin." I have no problem with him shooting over my shoulder.
I'm shooting Port Orford Cedar shafts with four-point Cocobolo footing that I made myself. Here's a picture of one of my shafts from a pictorial I did for a instructional on making four-points for an Alaska bowhunting forum.
How close do I need to get??? Well.... I'm not as competent with my longbow as Lisa and I are with our longrange .338 competition rifles or even most bowhunters with their new fancy bows. If an animal is 25 yards (maybe 30), he's dead. I know that's not far but I know my limit and I stick with it, especially with bears.
I have no worries shooting a Kodiak brown bear through the ribs. I've skinned a few and I'm amazed at how wispy and thin their ribs are. On the other hand, I can't believe how massive and tough their shoulders are. They're big blocks of muscle, bone and sinew.
I've run into many, many Kodiaks up here and they normally don't want anything to do with people. But if you nudge into their personal/attack zone they can be pretty aggressive if not very, very dangerous. 25 yards is pushing them to aggression especially if they have cubs or are guarding food.