Never heard of pressure bleeding but curious to give that a try this summer.
With trout and salmon I usually stun an pop a gill. If you’re like me and have a tough time keeping your gear organized, don’t worry about using any equipment: just a solid punch with a closed fist to the top of the head then use a finger to pop a gill. To pop a gill you can just put your index finger in the gills and pull towards the tail. I do both sides because of my OCD, but one is probably good enough.