Trying to get good starting point, Hybrid 100V wasnt first choice but it was available. I have Sierra TGK 130 grain bullets
Sierra lists. Min 36.9 Max 40.2
Hodgdon lists Min 39.9 Max 42.8
Barnes lists for their 130gr. Min 37.9. Max 42.1(c)
Thinking starting @ 39.0
Any input appreciated

Run it up at max, or slightly hotter. But you didn't say what brass you were using, which WILL make a difference. Lapua 260 brass is thick, so you will need to reduce the load some for that.

Using what I can get these days, Starline

I use the Satterlee test to save powder. Find a start and stop point in your grain range (usually above max a little) and shoot each round. I record the velocity looking for a node but I also find out what my gun decides is max pressure. I can do all this and save a lot of components at the same time. I’m sure you’re aware of this test but if not, look it up on YouTube. I usually do .2g increments.