Just wondering if anyone has give the Hornady Z-max bullets a try...and if so how do they compare to the V-max line?? I was going to get some 6mm Hornady V-maxs in 58 Gr but see they also offer the Z-max in this bullet as well. The BC is the same on both as well as the sectional density. Both have a poly tip green/red. So whats the big differance??? Thanks