Nice job on your first batch, looks like you did fine to me. I'm glad to hear that you checked your dippers, as I found that the Lee chart was "off" for both Unique and Accurate #2, but pretty accurate for H110 and Titegroup. YMMV. I've made a few of my own custom size dippers by sanding down the top surface of larger Lee dippers as well as from .25ACP and .32ACP cases.
Just FYI, and you don't have to be in a rush to try this (work up to it), but I find that 5.3 grains of Unique under a 158 gr. LSWC (as you have there) is a very good (and much, much less expensive) imitation of the .38 special Remington R38S12 158 gr. LSWCHP +P SD cartridge (aka the FBI load).