Your biggest limitation for your bow is yr short draw length. While your bow might ibo at 300+ with a 30"' your short draw length is really robbing you of kinetic energy.
What speed are you currently running with your bow, and what arrow weight? Any bow that can stick an arrow into the heart of an elk will kill one, but having a bow that will push a 2" punch cut mechanical head on a 425grn arrow clear through an elk to the other side is a lot more comforting for my use.