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We report on the power scaling of a flashlamp-pumped Cr:LiSrAlF6 thin-slab zig-zag laser operating at repetition rates up to 5 Hz. Average output power of 44 W with pulse energies of 8.8 J was achieved operating with a stable cavity. Excellent medium control was also obtained during this operation. Also demonstrated at 5 Hz was operation at energies ∼ 0.5 J in Q-switched mode with unstable optics and bandwidth control, beam quality < 1.5 XDL, bandwidth ∼ 1 GHz, and root-mean-square beam jitter of less than half of a diffraction limited far-field spot radius.