steelheadmike
WKR
I bought some Nosler 140gr ballistic tips for the reason that I have a few books and online resources/Vihtavouri app that I can come up with a good starting point. I'll post my proposed starting points later after I can look at everything.
I've been following along with a precision reloading series on YouTube where the guy goes into how to use it properly. Between that and some other resources, I feel pretty safe.
I plan to double check my work via Rokslide and a reloading group I'm a member of on Facebook before I do any actual loading just to be safe.
Like most beginning reloaders (myself included), you might be starting to overthink it. Viht has data for 140 NBT and N540. Pick a charge somewhere between min and max. Work up to pressure and then back off a bit. If you're happy with the results, load a bunch and go shoot. If not, tweak one thing at a time until you get something you like.
I went down the rabbit hole of following along with the "precision" reloaders, only to find the vast majority of it means nothing because sample sizes are too small. GRT is a good secondary tool but it is NOT a substitute for published data nor your own experience with your handloads.