Not finding your favorite powder for sale? This chart can help find powders closest to yours. I did that with my alternative to Reloader 22 and found Viht N560 and it worked great. Nosler listed it in their manual.
Reloading safety is of prime importance thus you must begin a new powder at starting loads and work up. The internet should give some start load data sources if you search your caliber and alternative powders.
All reloading manuals list alternative powders but there are some older reloading manuals that are not current in new state-of-the-art powders.
IMR published a burn rate chart PDF below and includes many brands.
Check it out.
https://imrpowder.com/wp-content/uploads/2017/02/burnratecolor.pdf