These are pretty interesting. Missouri Bullet's 215 grain '45 Express' coated 45 ACP/Colt bullet. It is essentially the old SAECO #58 with the lube groove removed to simplify application of the 'Hi-Tek 2' coating. The Express/SAECO 58 has a large .355" meplat and made its bones in bowling pin shoots popular a few years ago. At 20 BHN it isn't going to expand but it will hit hard and leave a big hole, coming and going.
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I tried a box with a couple of proven accurate 45 ACP loads and could never get them to shoot really well. Summary here.
https://www.glocktalk.com/threads/anybody-loading-missouri-bullets-215-grain-45-express.1754464/
