Here's my chrono report. Note, I was firing it thru a five inch S&W revolver.
Name: 9mm: 124gr Xtreme RN, Win 231, 4.3gr, Win Case
Notes: S&W 929 5" barrel
Shots: 30
Average: 950 ft/s
SD: 17 ft/s
Min: 928 ft/s
Max: 989 ft/s
Spread: 61 ft/s
Power Factor Average: 117
Power Factor Low: 115
Power Factor High: 122
Weight: 124.0 gr.
Powder: Win 231 4.3gr
Case: Win
Primer: Fed SPP
Bullet: Extreme 124gr RN