I have been shooting for IPSC production and there is no benefit of loading any hotter than I am, but I'm a little curious what powders push bullets faster in a .40.
I have Unique, w231, Titegroup, and lil Gun for pistol loading on my shelf.. I bought lil gun for .30 carbine and .357 mag but I have seen a bit online about it for .40. I have done a couple fun shoots with 5.5gr of Unique and a 165gr bullet and they aren't really hot but have a little kick to them.
Just curious, I don't want to push things too much. I believe if you want to push it hotter, it's a good excuse for a bigger gun.