![Experimental PTR RES anti tank gun from 1942. 20 mm bullet was based on 45 mm casing, that gave it velocity of around 1300 m/s with roughly 60 mm of penetration at Experimental PTR RES anti tank gun from 1942. 20 mm bullet was based on 45 mm casing, that gave it velocity of around 1300 m/s with roughly 60 mm of penetration at](https://preview.redd.it/experimental-ptr-res-anti-tank-gun-from-1942-20-mm-bullet-v0-taucfzv4798a1.jpg?width=640&crop=smart&auto=webp&s=1ff3da42cf739dc8797a30bbfb979e8040e7b8e0)
Experimental PTR RES anti tank gun from 1942. 20 mm bullet was based on 45 mm casing, that gave it velocity of around 1300 m/s with roughly 60 mm of penetration at
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world war two - What damage did anti-tank rifles hope to inflict on tanks in WW2? - History Stack Exchange
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