Does GP barrel apply on-hit effect?
Because wikia doesn't say so despite a jg GP (who the hell plays that and why would you play that?) saying it does.
Because wikia doesn't say so despite a jg GP (who the hell plays that and why would you play that?) saying it does.
It does. All of them.
Though only the first barrel in a chain triggers Tiamat passives.
There’s a reason to TriForce on his is ridiculously strong.
This is incorrect. The only on-hit effects applied on Powder Kegs are Sheens, Iceborn Gauntlets and Trinity Force's. Tiamat Items have their AoE effect applied around the Keg GP shoots or hits because it's an AA that detonates the Keg, he procs the Tiamat effect on the Keg. Bloodrazor, Bork, Deadman's Plate; You name it. They do not interact with Powder Keg in any way shape or form.
For Reference, I have 940k mastery points on Gangplank. I know what I'm talking about :P
It does. You can even apply 

to a barrel.