The purists will scream, but I'll take a contrary view here.
Dillons are great machines, but not the best with which to learn the science of reloading.
There is a lot more to the process than just pulling the lever and cranking 'em out.
Cases abound where novice reloaders have produced faulty rounds (most often double-charged or not charged) with unhappy results. Often, there's a progressive press in that equation.

-my $0.03 YMMV

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-jwk-
US Army '72-'95