Several folks have noticed that the newer loading manuals have much less "aggressive" loads than the older ones.
My son first pointed this out to me when he went over the old manuals from the 1960s and 70s I had given him and compared the charges with modern ones from the same brand manuals for the same cartridges, powder and bullet styles/weights.
I guess the best recommendation is to stick with the newer, lighter loadings from "official" manuals because there must be some reason the manual-makers got more conservative.
Besides, if you blow your hand off, you have someone with deeper pockets to sue than the Joe Sixpack who recommended some sooper dooper powder charge on the interwebz and probably even got the powders he used mixed up.... "Oh, sorry, I meant blue dot when I wrote red dot."
As far as your feeding problem goes, "every gun is a law unto itself," and it's a case of cut-and-try sometimes. One of my .380s will not feed one brand of commercial hollow points, no matter what, and another one eats the same brand ammo like they were M&Ms.
Terry, 230RN