I have the Z5 and like it it will shoot under 2 inches at 100yd with all the loads it likes.I use Shock Waves 200,250 & 300gr I particularly like the 250 with 120gr RS pyrodex some times I use 250gr XTP they shoot with the same load as the 250 Shock Wave and I use the HPH24 Sabot with both. It will also shoot ballets 230gr XTP and Power Belts the PB's like 150 gr and act like a vamit bullet. Lee