Disclaimer: Following post lists loads not currently published by Hodgdon. Use them at your own risk.
I am continuing my load development with WST and so far tested 4.0/4.2 gr at 1.160" and 4.3 gr at 1.165"/1.168" OAL.
Even at 1.160" OAL, 4.2/4.3 gr were compressed loads. Instead of increasing powder charge higher than 4.3 gr, I would suggest you try shorter OAL of 1.155"/1.150" to increase neck tension and initial chamber pressure build up. Some match shooters shot 124 gr FMJ with 4.3 gr at 1.140" and I plan to stop my testing at 4.3 gr but test shorter OAL in future range tests.
I will be packing and moving this month so my range test will have to wait until December.
Keep us posted and I will be following how your testing goes.