Yes, downloading is dangerous, as is reloading period. Downloading certain powders can become extremely dangerous, especially with slower burning powders that are specifically designed for rifles and nothing else. For example, loading something like IMR4350, H4831, Rotumbo, or something of the sort, in very small amounts would be quite dangerous. Conversely, loading small doses of Unique, amounts the powder was designed for, is perfectly safe, in most cases. I do not have any specific information regarding loading Unique in these calibers with Jacketed bullets. I am sure it is out there, but I have not found it, so I am asking for help from the members here, who have been much of a help in the past.

Until you throw a double change of unique, then things get exciting in a hurry. Better to use that stuff that uses up a lot of space whatever the number is.