I seat my bullets right against the lands for all the loads I have for exception of the bergers. I have read that if you jam the bullet into the lands you do run a chance of the bullet jamming in the barrel if you eject the shell. That will be a little problematic if you are hunting and will end the hunt for that time. I am not sure how much will it take for my bullets to get jammed so get a little excited about long bullets and might be unnecessary but it really dont bother me to do this. I have yet to experience this but I dont want to risk it.