I'm new to reloading and I've reloaded about 200 rds. of .40S&W so far with no problems at all. Today was another story... I started to reload some 9mm and I was having some difficulty. The 9mm bullet wasn't seating right, I had some that were ok and others that I could push into the brass with one finger. Can I still use the ones that aren’t very tight into the brass? Then I was reloading some .40 and was having the opposite problem. The bullet was seating way too tight and this is what happened to a few of them.
Some seated ok and some looked like these. All the brass was just once fired. What am I doing wrong? Thank you for your help.

Some seated ok and some looked like these. All the brass was just once fired. What am I doing wrong? Thank you for your help.