When working up a good hunting load for a new handgun and caliber what size increments do you use? With rifles I use .3 grain increments but I don't recall reading what is typical with a handgun.

I am trying to get good loads for .44 magnum with 240 grain and 300 grain XTPs and 280 grain A Frames. I am working with 2400 and H110 and may try HP38 as well.