Have done quite a bit of testing with the 32g Vmax and Zmax in my cooper 20vt. They weight the same, look the same, BUT for me the Vmax consistently had much better groups, haven't got a clue why. Same cases, loads. primers even had a friend load them so I didn't know what i was shooting. The difference was significant enough that I returned a 1000 zmax and spent the extra for the vmax.
My 2cents
