I bought some "NEW" never fired starline 45acp brass for my match loads and found this to be true too with my lee priming hand tool. its not so hard that you darn near break your equipment seating primers but its is deffinatelly alot stiffer then say winchester or federal brass where the primer just seem to pop right in and sometimes you feel you should check to see if you actually seated a primer or not. with the starline brass you know when you are seating a primer.
BC what brand of primers are you using?? federal and magtech primers go in without tomuch resistance. winchesters seem to have the most resistance. but surprisingly CCI primers go in easier then the winchesters. I dont worry tomuch about I actually like having the piece of mind that primers arent gonna back out on ya.
PS did you ever get you a Lee powder throw?? how did it work out for ya?