.300 RUM/225 ELD, 7WSM/180 ELD. I used my actual velocity in the 7WSM with 25" barrel and compared both using pressure-tested data and QL. I gave the RUM every advantage I could- 1000 psi higher peak pressure, an extra inch of barrel, etc.
Sucks to burn nearly 40 gr more powder with every shot, and still come in 2nd place