Finished up the testing of the Wolf Military Classic 7.62x39 124gr FMJ round. Here are the conditions and results.
-Test rounds fired from 15 feet
-"FBI spec" (Their term, not mine...) Clear Ballistics gel block
-2337 FPS, 1503 FT/LBS energy
-31.5'' of penetration
-Tumbled a few times (see video below)
Here's the video showing the test, the permanent cavity, where the bullet started to tumble, and a discussion of the results:
Wolf 124gr Military Classic HD Gel Test Video Link