Very Heavily inspired by Castboolits member Depoloni who uses stacked wet newspaper for these type of tests.
Permagel was the media used.
Top is 300 Blackout with 125g Nosler ballistic tip 2300FPS
Middle is 458 SOCOM with hollowpointed 500g cast 1100FPS
Bottom is 223 with 79g DRT
The 458 exited the top of the second block and was not recovered.
While the wound channel from the 458 doesn't look very impressive it was the only one that caused the gel block to violently jump off of the table. I Wish I could get my hands on a high speed cam!
The jacket from the 300 went about 2" in to the second block.