I'm what I would consider to be a relatively big shooter. Not as much as I've seen in some videos here, at least most of the time, but certainly more than average.
Although it's not exclusively so, I seem to shoot much bigger loads after receiving anal play. Not surprising though...The biggest load I ever shot though was after 3 days of edging, leading up to watching my wife be a 3-hole, ATM slut for her first BBC for 6 hours. I edged myself the whole time, and received very little direct cock stimulation and no anal stimulation beyond just wearing a standard butt plug the whole time. After the bull left the hotel room, I jerked off and shot an absurdly large load that I wish I would have recorded, because it was at least 10 big ropes, over half of which easily shot over my head and hit the headboard of the bed...