Abstract: A can end having an improved pour-type ecology opening mechanism includes a conventional can end wall that contains a score line that defines a displaceable panel. The score line includes an initial design rupture point, a radiused portion having a first tangent point and a second tangent point, and a main portion that terminates at a final transition point. The can end further includes a tab having a liftable heel portion and a tab nose portion, with the tab nose portion being positioned to apply downward pressure to the panel at a pressure point on the displaceable panel when the heel portion is lifted. The tab has a center line that is coincident with a radius of said can end wall. Advantageously, the pressure point is positioned a distance, taken in the direction of the center line, from the second tangent point of the radiused portion that is selected to prevent a buildup of force that would otherwise hasten propagation of separation along the main portion of the score.