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20 rounds 308W Winchester Supreme 150 grain Silvertip.
All mail order sales of ammunition to the public require a NZ Police permit.
https://www.firearmssafetyauthority.govt.nz/sites/default/files/2024-09/Mail%20Order%20or%20Internet%20Sales%20of%20Arms%20Items%20or%20Ammunition%20-%20FRM43A.pdf