Seating the bullets the way you describe is not a very safe method, especially for the handguns. You should stick to the loading manuals for your first rounds. There are methods to determine a good seating depth using a smoked bullet (or black marker) that have been described here many times. Or you can get a Stoney Point gauge. Both methods work well.
Are you seating the bullets with a sized or unsized case? If you're using sized cases and full house loads, you are setting yourself up for a big KB, again this is especialy true for the handguns.