The 147gr laods were a little on the light side to make 125 PF.
Alliant lists a MAX of 4.7gr of BE86 with a Federal 147 in 9mm
(guessing 4.2 of 4.3 to make 125 PF with the Xtreme 147)
Xtreme 147 RN S+B SP Mixed range brass 5" 9mm 1911'
Charges as thrown after setting measure
String: 2
Date: 3/26/2017
Time: 11:10:35 AM
Grains: 147
Hi Vel: 791
Low Vel: 774
Ave Vel: 783
Ext Spread: 17
Std Dev: 7
XTreme 147 1.16 OAl 3.7. BE86
Velocity Power Factor Ft/Lbs
775 113.925 196.03
787 115.689 202.148
788 115.836 202.662
791 116.277 204.208
774 113.778 195.524
String: 5
Date: 3/26/2017
Time: 11:41:22 AM
Grains: 147
Hi Vel: 848
Low Vel: 810
Ave Vel: 830.4
Ext Spread: 38
Std Dev: 14
XTreme 147 1.16 OAl 4.0 BE86
Velocity Power Factor Ft/Lbs
826 121.422 222.76
810 119.07 214.136
835 122.745 227.558
833 122.451 226.469
848 124.656 234.699
RMR 124gr Plated RN
String: 3
Date: 3/31/2017
Time: 3:10:32 PM
Grains: 124
Hi Vel: 976
Low Vel: 957
Ave Vel: 966
Ext Spread: 19
Std Dev: 7
RMR 124 1.12 OAL BE86 4.5gr
Velocity Power Factor Ft/Lbs
973 120.652 260.645
957 118.668 252.143
962 119.288 254.785
976 121.024 262.254
965 119.66 256.376
RMR 124gr Plated RN - Charge ladder
S+B SP Mixed range brass 5" 9mm 1911'
Charges as thrown after setting measure
String: 1
Date: 3/31/2017
Time: 3:12:00 PM
Grains: 124
Hi Vel: 1032
Low Vel: 995
Ave Vel: 1013
Ext Spread: 37
Std Dev: 15
RMR 124 1.12 OAL BE86 4.7gr
Velocity Power Factor Ft/Lbs
1023 126.852 288.121
1032 127.968 293.213
1016 125.984 284.191
1001 124.124 275.862
995 123.38 272.565
String: 3
Date: 3/31/2017
Time: 3:14:34 PM
Grains: 124
Hi Vel: 1070
Low Vel: 1045
Ave Vel: 1054
Ext Spread: 25
Std Dev: 10
RMR 124 1.12 OAL BE86 4.9gr
Velocity Power Factor Ft/Lbs
1070 132.68 315.203
1051 130.324 304.109
1048 129.952 302.375
1059 131.316 308.756
1045 129.58 300.646
String: 4
Date: 3/31/2017
Time: 3:15:43 PM
Grains: 124
Hi Vel: 1112
Low Vel: 1080
Ave Vel: 1093
Ext Spread: 32
Std Dev: 12
RMR 124 1.12 OAL BE86 5.1 gr
Velocity Power Factor Ft/Lbs
1112 137.888 340.434
1099 136.276 332.521
1089 135.036 326.497
1088 134.912 325.898
1080 133.92 321.123
String: 5
Date: 3/31/2017
Time: 3:17:17 PM
Grains: 124
Hi Vel: 1135
Low Vel: 1087
Ave Vel: 1115
Ext Spread: 48
Std Dev: 17
RMR 124 1.12 OAL BE86 5.3 gr
Velocity Power Factor Ft/Lbs
1135 140.74 354.662
1117 138.508 343.502
1118 138.632 344.118
1087 134.788 325.299
1120 138.88 345.35
String: 6
Date: 3/31/2017
Time: 3:18:05 PM
Grains: 124
Hi Vel: 1180
Low Vel: 1143
Ave Vel: 1158
Ext Spread: 37
Std Dev: 14
RMR 124 1.12 OAL BE86 5.5 gr
Velocity Power Factor Ft/Lbs
1180 146.32 383.343
1163 144.212 372.377
1160 143.84 370.458
1143 141.732 359.68
1146 142.104 361.57
RMR 124gr Plated RN - 2 different OALs
S+B SP Mixed range brass 5" 9mm 1911'
Charges as thrown after setting measure
String: 5
Date: 3/31/2017
Time: 2:59:36 PM
Grains: 124
Hi Vel: 1015
Low Vel: 977
Ave Vel: 998
Ext Spread: 38
Std Dev: 14
RMR 124 RN 4.5 BE86 1.09 OAL
Velocity Power Factor Ft/Lbs
1005 124.62 278.071
1015 125.86 283.632
1000 124 275.311
977 121.148 262.792
995 123.38 272.565
String: 4
Date: 3/31/2017
Time: 2:57:54 PM
Grains: 124
Hi Vel: 991
Low Vel: 958
Ave Vel: 975
Ext Spread: 33
Std Dev: 15
RMR 124 RN 4.5 BE86 1.11 OAL
Velocity Power Factor Ft/Lbs
982 121.768 265.489
991 122.884 270.378
961 119.164 254.255
986 122.264 267.656
958 118.792 252.67
Alliant List MAX of 5.8 BE86 with a 124 FMJ 1.12 5.8gr BE86 as the MAX
Hope this helps.