Sounds more like a .38 to me.
I've made this mod to give it more powerful sound.
Installation: Use Nexus Mod Manager or manually put it in your Fallout 4 Data folder.
Make sure that your Fallout4.ini file is modified to allow the game to load custom sounds
It should look something like this:
bInvalidateOlderFiles=1
sResourceDataDirsFinal=
I am using the .44 Magnum Retexture made by Exodus
.44 Magnum Retextureby Exodus