This thread needs more GUN PORN!!!
;-)
Use the hodgdon data at the low end of the range and get a chronograph so you can see the velocity. Most all pistol powders are fast and they should all burn without any problem in that barrel.
Data from the powder manufacturers is reliable. Other sources may not be.
What makes you think that you are overcharging?
Overcharge concern only entered in when thinking about a faster burning powder.
I realize the pistol powders are fast, but some off the shelf shoot-em-up ammo makes a noticeable flash/flame. I infer the powder is still burning when the bullet leaves the barrel.