Heh, heh. Yup. You're fine, but any excuse for coffee is a good excuse, IMHO.
There was a time, fifty or sixty years ago, when all bullets with jackets of a given weight and nose style were made the same way and had the same shapes COL's. As
explained by Allan Jones in this article, that is no longer true. You want to get a COL from the bullet maker, and not take a general one from a loading manual. Moreover, you want the maker to supply the load data if possible. If, like many plated bullet makers, they just say to use the middle range for jacketed bullets, go out and find at least three sets of load data for different jacketed bullets of the same weight and general shape and use the lowest range among them as your starting point.
As to COL, the main purposes of controlling COL are to ensure a round fits in the magazine and to ensure it feeds. As you've discovered, a slight difference in nose profile can invalidate a COL from the feed standpoint. From the pressure standpoint, if you have two identically constructed bullets but with different profiles, what matters most are the seating depth and distance the bullet has to jump to the lands. In the 45 Auto, specifically, the jump to the lands is less of an issue than it is in a high power rifle because of the lower pressures involved, but the tiny powder space makes seating depth more important.
Seating Depth = case length + bullet length - COL
If the seating depth of your bullet matches the seating depth of the bullet you got the data for, and that bullet has the same construction, then the charge weights will tend to be the same. Small differences in seating depth, like the 0.015" you are talking about are too small to matter much. Indeed, that's within the length variation of some bullets I've measured. Anything over about three times that difference in the .45 Auto I would work the load back up for.
