Wow, posting a question and then answering it two posts later! That's a new one!
I use a Stoney Point Overall length gauge, and bullet comparator attached to my digital caliper (which all handloaders should have). Lets me see exactly how far out I can seat the bullets before they hit the lands. None of my rifles have a throat short enough to allow the bullet to be seated within .01" of the lands and still have enough bullet in the neck and/or fit in the magazine.