I've never used nor carried a bang stick but have had a heck of a time landing large halibut, even with a harpoon. I usually tire them out, harpoon them, allow them to bleed as much as possible and then quickly get them in the fish box but I'd prefer to kill them asap. It's partially that I don't like the thought of them suffering, dying slowly that is, but also that they could hurt someone or cause damage flopping around on the boat.
I know some folks shoot them with a conventional firearm or may use a bang stick. Do firearms or bang sticks kill them immediately? What are the pros and cons to a bang stick vs. firearm? And which caliber (or shot size) is the most effective?
Thanks in advance for your advice.