First advice, never, ever, ever load 150 rounds of ANYTHING unless you've tested much smaller batches. 10, 15, 20. NEVER 150.
Second, where did you get the data for those loads? You should be starting at a starting load from official published data. Hodgdon lists 4.5gr starting load for 115gr. If your data shows max only, you should be starting at 10% less, which would be 4.3gr.
Do you have and have you read a modern load manual?