Please note this is a question!
Could it be the what would be a dangerous load in the Lyman manual is actually for a strong rifle like a #3 Ruger? If so there should be a note saying not to use the load in a Krag.

When I used to load for my son's 45/70, most manuals had 3 levels of loading, one for trap door Spingfields, one for lever actions and one for strong bolt actions. My sons 45/70 is a small framed NEF single shot so NEF said we could use the lever action loads.
Loading for a 45 colt is similar, old revolvers with Ruger and Freedom Arms in a different class.