Sure, here's some calcs.
Let's start with Icy Wind:
vs. 0/0 Garchomp
- Expert Belt: 92.71 - 110.36%
- Life Orb: 100.56 - 119.32%
vs. Offensive Pivot Landorus-T
- Expert Belt: 94.85 - 111.92%
- Life Orb: 102.98 - 121.13%
Secret Sword:
vs. Offensive Heatran
- Expert Belt: 98.14 - 115.78%
- Life Orb: 106.19 - 125.69%
It's the same deal for SubTran, btw.
Hydro Pump (outside rain):
vs. standard Gengar
- Expert Belt: 94.63 - 111.87%
- Life Orb: 122.98 - 145.59%
vs. Specially Defensive Heatran
- Expert Belt: 84.15 - 99.74%
- Life Orb: 91.16 - 108.05%
vs. Offensive SD Scizor
- Expert Belt: 83.27 - 98.22%
- Life Orb: 108.18 - 127.75%
vs. Physically Defensive Skarmory
- Expert Belt: 78.44 - 92.51%
- Life Orb: 102.09 - 120.35%
vs. Standard Forretress
- Expert Belt: 74.01 - 87.28%
- Life Orb: 96.32 - 113.55%
vs. Standard Lucario
- Expert Belt: 92.9 - 109.57%
- Life Orb: 120.92 - 142.55%
Hydro Pump (in rain):
vs. OTR Reuniclus
- Expert Belt: 82.15 - 96.82%
- Life Orb: 106.84 - 125.91%
vs. Choice Scarf Jirachi
- Expert Belt: 85.33 - 100.58%
- Life Orb: 110.85 - 130.79%
vs. Specially Defensive Skarmory
- Expert Belt: 81.13 - 95.5%
- Life Orb: 105.38 - 124.25%
vs. Swords Dance Breloom
- Expert Belt: 84.35 - 99.61%
- Life Orb: 109.54 - 129.38%
vs. Offensive Deoxys-D
- Expert Belt: 80.91 - 95.02%
- Life Orb: 104.97 - 123.65%
vs. Bulky Swords Dance Scizor
- Expert Belt: 80.23 - 94.47%
- Life Orb: 104.36 - 122.67%
I could get more on stuff that becomes a 2HKO but this stuff should suffice.