I am the same age as you with aging eyes, and I found the VXR 30mm 3-9x40 with either the duplex firedot (heavier reticle and a bit wider than the standard Leupold) or the same scope with a ballistic firedot (has a circle x) works real well for me. I have not yet used the firedot in a hunting situation, but it is nice to have just in case. The 4-12x50 in the VXR line might be better for you, where I hunt I do not need the extra magnification.

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