'FredC' - The Krag trigger-spring is quite strong and should 'lever' the sear completely 'up' and return the trigger to the full forward position.

IIRC - S&S Firearms (Glendale, N.Y.) has original Krag trigger-springs for $3.00 apiece.

I don't think lubrication is a big deal with Krag triggers. It is probably a case of "less is more". I use a little bit of Wilson Grease intended for .45 auto pistols.
Old hardened cosmoline should be removed; it no longer lubricates.

(The following is some Midwestern Humor and not to be taken seriously):

Fred, you will get better pencil velocity with the graphite on the outside of the pencil, instead of being inside.
(Though, you were wise to stock up on pencils, years ago)!

I fired off a box of "Paper-Mate" #2 pencils this afternoon, powered with IMR-4759.
Sharpening the tips really improved velocity, but, my penetration didn't equal Fred's.
The melted eraser residue was difficult to remove from the bore. I had to resort to 'GUMOUT'.