[QUOTE=bvy;1440727] But if we agree that the two frames under consideration (15 and 27) have roughly the same density, I'm confused as to why I was able to get a really contrast print on grade 2 paper (frame 27, print #1).

If you are referring to the two pictures of the boys then the more contrasty print was in fact grade 2 as the paper's natural grade is 2 without any filtration. On the other you have used a grade 1 filter which is why it is less contrasty and flat looking. I much prefer the non filtered print but I'd give a grade 1.5 a try as the unfiltered grade 2 might be just slightly too contrasty but we are getting into a very subjective area now