Because I don't like them. I have had a far amount of parallex problems with 2 of them, and I DON'T like the eye-relief, or lack of it I should say, especially for a 300mag. I am not talking about shooting from a bench, but in the field in funny angles. Not enough for me.
For the about the same price you can get a VX-1 in 2-7, or a Leupold 4x. They get my vote everytime.
After 20+ years of abuse the 2-7 is still going strong, from 6 years in Alaska and every place inbetween.
I am not saying the 3200 will not hold up, but I find no reason to find out, I dance with who brought me.