Buy the Lyman 47 or 48th editions, they are good; also Nosler, Sierra, Hornady, and/or Speer...if you shoot those respective bullet brands. Older manuals are good to keep around,too, if you shoot classic powders, and can be had relatively cheaply at gun shows, but, reference/compare with some newer manuals before you load 50 rounds. (Some powder compositions change some over the years, always start low and work up..)
For the 25WSSM, Ramshot powders has loads for that caliber, and their whole manual is on-line for free...do a google for the site.
As for "internet loads" WOW, I see significant/dangerous overloads given out every 2-3 weeks, including sometimes here on this forum!!!
ALWAYS reference check the safety of an internet load with a manual!!
