Another vote for Vixen. They come in a few magnification ranges, all 4x zoom though. 2-8, 3-9 or 4-16, with Mildot or BDC reticle. All have side focus / parallax adjustment as well. They are second focal plane so the reticle stays the same across the zoom range. You'll need to work out the subtensions at different ranges for each magnification.
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