I'm new to the world of reloading and i'm feeling my way very carefully. So far i've full length resized and decapped some once fired Federal brass and cleaned them. I've seated one dummy bullet into an unprimed case and have kept seating the bullet down until it now chambers in my rifle (Tikka 595). It measures 2.750 overall length and i was going to seat it into the neck a further 15 to 20 thou to take the bullet off the lands. BUT, reference to Modern Reloading and Speers No.12 both give a maximum cartridge length of 2.710 so I would exceed this by 30 thou. What am I doing wrong and how do I proceed?