Thread: Best .223 rounds for an 18.5" 1:9 barrel

Nothing special about the twist rate, length, or it being a CZ that changes much. You will be limited to about 70gr in projectile weight by the twist.

69gr TMK's were what I used to squeeze the most out of mine... but I was reloading. I'm not aware of any factory ammo available in NZ loaded with that bullet.

The market is pretty devoid of options in that 56-70gr range as far as hunting ammo goes with a bullet that's well suited to target shooting too. If it shoots the 60gr V-Max well then maybe that's an option. Otherwise there are plenty of 55-62gr soft point options that the rifle will probably shoot well and allow you to casually bang steel out to a few hundred metres.

Please don't use FMJ's or HPBT match bullets on animals.