I have some chrono data with HP38 and a 125.
I was on the lower side because I was looking for something right around 125-130PF (about 1030fps) Some of these were a bit low.
Mixed range brass, S+B SP, charges as thrown after setting measure
5" 9mm 1911
String: 9
Date: 2/28/2016
Time: 9:13:21 AM
Grains: 124
Hi Vel: 989
Low Vel: 968
Ave Vel: 982
Ext Spread: 21
Std Dev: 9
Berry 124 HP 1.08 OAl 3.9 HP38
Velocity Power Factor Ft/Lbs
968 120.032 257.973
989 122.636 269.287
988 122.512 268.743
989 122.636 269.287
976 121.024 262.254
(does not make PF, PIF bullets limited supply no work up)
String: 1
Date: 2/28/2016
Time: 8:46:42 AM
Grains: 124
Hi Vel: 1035
Low Vel: 977
Ave Vel: 1008
Ext Spread: 58
Std Dev: 23
XTREME 124 RN 1.12 OAl 4.3 HP38
Velocity Power Factor Ft/Lbs
1035 128.34 294.92
995 123.38 272.565
977 121.148 262.792
1026 127.224 289.813
1010 125.24 280.845
(does not make PF-sort of, PIF bullets limited supply no work up)
String: 1
Date: 7/23/2017
Time: 10:43:16 AM
Grains: 124
Hi Vel: 1001
Low Vel: 970
Ave Vel: 987
Ext Spread: 31
Std Dev: 13
RMR 124 HP-old 4.3 HP38 l 08 OAL
Velocity Power Factor Ft/Lbs
970 120.28 259.04
992 123.008 270.923
1001 124.124 275.862
977 121.148 262.792
996 123.504 273.113
String: 2
Date: 7/23/2017
Time: 10:44:23 AM
Grains: 124
Hi Vel: 1046
Low Vel: 1003
Ave Vel: 1026
Ext Spread: 43
Std Dev: 16
RMR 124 MPR-HP 4.5 HP38 1.08 OAL
Velocity Power Factor Ft/Lbs
1003 124.372 276.965 (This one messed up the SD and ES #s)
1036 128.464 295.49
1022 126.728 287.558
1025 127.1 289.248
1046 129.704 301.222
From Hodgdon's web site
125 GR. SIE FMJ Hodgdon HP-38 .355" 1.090" 4.4 1009 24,600 CUP 4.8 1088 28,800 CUP
124 GR BERB HBRN Plated Hodgdon HP-38 .356" 1.150" 3.9 920 27,400 PSI 4.4 1037 31,900 PSI
125 GR. LCN Hodgdon HP-38 .356" 1.125" 3.9 1009 25,700 CUP 4.4 1086 31,200 CUP