I am new to reloading .38 special and in particular wadcutters. Of course you need to keep the OAL below maximum so round will not hang up in cylinder, but are there any rules regarding how far to seat the bullet? I realize seating deeper will increase pressure. Also if using the same amount of powder in a starting load, will using a .357 magnum case as opposed to a .38 special case decrease case pressure significantly assuming bullet is seated to the same depth?