The performance that we saw with M855A1 is easily extended to M80A1. Accuracy is ball like, and terminal performance is astounding. Quite a bit more penetration that one might need for HD/SD/PP, but if there's a barrier, this is going to wreck it. Still not sure how I lost the footage for the gel portion, but I made it work :D One noteable difference between M855A1, M80A1, and the XM1184 projectiles (if these are indeed legit) is the tip hardness. M855A1's tip is 59-60 RHC, while the other 2 are slightly softer at 49-50 RHC.
Macros: https://flic.kr/s/aHBqjBQuXC
WPA "Buffman" but man these are salty. I remember when they hit rock bottom at $1/rd..: https://warpigarmory.com/product/m80a1-for-sale/