In this video, Demolition Ranch’s Matt Carriker pits a Sherman tank‘s 76mm main cannon against ten gun safes lined up in a row:
About 7 minutes in you can see the second round fired spinning down after penetrating several safes and being deflected to the side…
The Sherman in the video is an -A4E8, last production model of the Sherman. All were built in 1944 0r -45. This type of Sherman was used in the Korean War, and was considered the peer of the celebrated T-34/85. Yes, Shermans did encountersT-34’s during the Korean War.
You should slant the safes at various degrees to see the effects of slant armor