Ditto, and if you're getting the accuracy you want, well. if it ain't broke, don't fix it! Remember that single shots are a different animal than magazine weapons, you don't have to worry about fitting into a magazine and you can play with seating depth when the guy with a magazine rifle next to you can't.
The only time you'll have to worry about increasing pressure is when the bullet is actually touching the lands of the barrel. That can raise pressures.