My shadow 2 likes 124 Gr bullets over 115. 124 shoots softer than 115 too and that helps in shooting faster in competition.
Here’s a couple of load development info when I was using Winchester 231 and 124 Gr JHP from PD on my shadow 2. I’m using sport pistol and N320 now.
4.10 Gr W231, WSPP, 124 Gr JHP @ 1.125-1.127 OAL (Shadow 2)
1024
1026
1003
1021
1024
1003
995
1034
1021
1024
HI 1034
LO 995
AVE 1017
ES 39
SD 12
PF 126.10
4.21 Gr W231, WSPP, 124 Gr JHP @ 1.125-1.127 OAL (Shadow 2)
1033
1040
1034
1036
1031
1049
1041
1054
1028
1028
HI 1054
LO 1028
AVE 1037
ES 26
SD 8
PF 128.58
Disclaimer: Use a manual as a guide. Reload at your own risk!