.40 is a Very hi-pressure round…..
I'm sure you have noticed by now, That there is not a lot of
latitude with the .40 SW caliber. I would stop once I had the pistol
Wow,I sure hope no one tells any of my .40's that they're touchy, problem dangerous cartridges to load. That's the one I play with MOST.
Here's a little secret: some powders have a starting and max load that are very close together. Other powders have several full grains between. Until you have all the bugs worked out, start on the low end of a powder that has some room before max, and pay attention to the listed pressures according to load and OAL. It's really an easy cartridge that gives you plenty of latitude so long as you PAY ATTENTION.