Primers come out easily with very little force, even crimped ones. I learned long ago to use only a little force. You can feel if your pin is misaligned or you have hit a berdan primer. If your press don't want to go, don't force it.
This wisdom comes after breaking many decapping pins. About 6 years ago I bought 10 of them and looking at the box I have 5 left plus one in the die. Broke one this year because there was a pebble stuck in the case.
I also found that magic compression that holds the pin in place until you hit a hard stop and then gives is elusive -- my pin kept creeping up until it wouldn't decap. Adjust, creep, repeat.