Newbie to the forums here, but not a newbie to shooting.
My STI Edge will be here this week and according to Brazos who I purchased the gun from, a good starting point is below.
I've run about 50 rounds through my 650 with the following, will test it out when I pick the gun up this week, then makes changes.
My starting round:
OAL - 1.22
Powder - 4.7 grains of Tite Group, N320 would be my choice, as I've loaded it in the past with my PARA P-16, just hard to find local.
Primers - Winchester Small Pistol - Will try small rifle later in another load
Brass - Starline - New
Bullets - MG 180gr FMJ
Info below is what I received from Brazos
OAL - Length of the cartridge should be 1.22 inches
Powder - 5.0 grains of Vihta Vuori N320 or 4.8 grains Hodgon Tite Group
Primers - Winchester small rifle primers are recommended although small pistol primers will work also
Brass - Remington (40 S&W)
Bullets - 180 grain Zero JHP (40 S&W) or Montana Gold
These loads should make a 168 to 170 power factor. However, when
determining the load that will work best for your gun, begin by using
about 10% less than the specified amount of powder. Check for pressure
and check for velocity using a chronograph. Work your way up until the
load meets the desired power factor without showing pressure signs.