Punch through sure but they expand on impact and make quite a sizable amount more damage than solids.
Some Fiocchi subs are made by CCI you'll have to look at your packet.
Winchester from America is the worst I've ever dealt with. Fail to fire, fail to extract, and dirty as anything. Failures were caused by too much variation in rim thickness. I do wish the Aussies remade their factory and started making the Aussie Winchester ammo again, that was market leader for hunting ammo for sometime I reckon. The US stuff I will not buy, terrible.
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