Nosler E-Tip Loads

Does anyone have experience loading the E-Tips? I’m stuck in CA unfortunately and have a box that I’m trying to work up a load with. My 6.5 Cross wasn’t a huge fan of the 127gr LRX so I’m trying some other options with the E-Tips and the CX. Nosler’s load data uses Nosler brass and I’m using Lapua plus some Hornady to play around with. From what I’ve read on other forums Nosler generally recommends starting at the base charge since their bullets tend to have a significant jump in pressure for small changes in powder volume. Trying to figure out what a good starting point would be and what my max would be with a different case volume.