Aside from the plethora of info available on this site that specifically discusses load development, here's an excellent article written by a friend of mine, prolly a decade ago?
http://coyotestuff.com/articles/rapid-load-development-strategy/
And, another one, at least as old...
http://coyotestuff.com/articles/ildm-load-testing-aka-ladder-test/
Then, take that knowledge & add in some takeaways from Mr. Cortina's long thread, here. Plus, newer articles on rapid load development, such as this one:
http://www.65guys.com/10-round-load-development-ladder-test/
Then, sprinkle in a bit of user knowledge on a program like Quickload, and it ain't all that hard to get a reloader's attention focused down to maybe 2-3 powders, and a charge weight range that can be covered with short, single shot, incremental ladder testing. With only those few references above, a reloader is well on their way to figure this kinda stuff out...
It's just not that hard to open Quickload & figure out a couple powders to try.
Then, use same to narrow a charge weight range to load & test for pressure...
Course, with all the reloading data for 'common' cartridges all over the inter webs, one could likely do without QL, althogether! But, for wildcatters, QL is a wonderful tool to speed up this part of the process...
So....then ya find OAL to land engagement, with any number of bullets of interest, in any number of ways available.
Then, load said bullets (all jammed) to test,
via single shot ladder,
over a chrono,
with intent of using both recorded muzzle velocities and POI on target,
to figure what is workin' and what ain't...
(there is no voodoo magic required to see what that is, the target don't lie)
Then, when charge weight happiness is found,
via low ES and/or 'flat spots' on POI,
ya can mess with backing off seating depth,
To 'fine tune',
even further,
if ya so desire...
Things are only as hard as we make em. So, if this gent has figgered out a way to market the obvious, then I wish him all the best!