I don't get too wrapped up in energy figures, velocity being squared skews the numbers too much in favor of light/fast rounds, which may not achieve the penetration needed to get into the plumbing. I'm more likely to go with a heavier bullet that actually expands a bit over some wunderkind bullet that creates a shallow wound and just makes the bad guy madder. Proven loads like the 158-grain SWC/HP have a great track record, and my own testing bears out those results.

I spent four years and around $4000 of my own money testing loads in numerous calibers in wetpack and water jugs, and to me, the faster/lighter loads often leave a lot to be desired. You might be up against a 98-pound crackhead, but it also might be a drunken 350-pound Samoan Wrestler who goes by the name Tiny. I'd rather have too much penetration than not enough. My 642 is stoked with 158-grain FBI loads because I TRUST them far more than the Boutique bullets at $1 a shot.