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Based on my own highly unscientific research, these are the SD rounds I have complete confidence in:
Top- Sig V-Crown
Best combination of expansion and penetration through water jugs and wet pack.
Second- Ruger ARX
Great penetration but tends to veer upwards or downwards. Devastating to water jugs, fwiw. The wound channel is brutal in wet pack.
Third- American Gunner XTP
Good penetration and ok expansion, but both less than the V-Crown. Still better than the others I tried.
Fourth- Sig Elite Ball
Flat-nosed FMJ that mimics the shape of the V-Crown bullet. Excellent penetration, but weak wound channel.
Not pictured is Liberty Civil Defense. It's a light, frangible round designed for home defense. No offense intended, but it just didn't pass muster at all. It blew the bejeebees out of water jugs, but only the first one. After that, the damage was nothing like the four above. YMMV.
Right now, one mag is loaded with 4 rounds of V-Crown and 3 ARX. The spare has 6 Elite Ball. I figure if I'm going for the spare, then it's a gun fight. Bets are off. I just want penetration and time to get gone.