FYI: I suggested to a friend in Idaho to take a #15 or #16 tire stud and press them into a hollow point .45 ACP round and use it for an AP round. It worked! Penetrated 1/2 inch steel plate. The inner rod is about 1/8 inch in diameter, but it is made out of the hardest steel money can buy, tungsten carbide.
Fairly cheap to buy in quantity from a tire tools wholesaler.
![image](https://americap2.nyc3.digitaloceanspaces.com/upload/photos/2023/12/MR3cz3zSYSldqR5dawBP_23_02951e87847066fd61047e6247b45186_image.png)