I have tested w231 with minimum to full loads in my 3", 3.5 & 5" 9mm pistols.

The 3" will give me from 914 up with a 124gr JRN plated bullet at 1.14" OAL.
My 3.5" pistol will get from 941 up to 1044fps for its best loads.
The 5" barrel starts out at 981 and can get up to 1153fps.

All three weapons have very good accuracy with the 4.2 gr load in standard brass cases with this 124 gr bullet.

Good shooting.

PS;
please note that the 124 gr style bullets can have a OAL form
1.075" out to a long 1.169"...........
so you do need to know what type bullet you are using, for a safe load.