It could be a number of things and a little difficult to pin point with out the exact process of the reloading procedure. As for the bullet not touching the lands, simple. You are seated to deep, if this is on a short action it's fairly common. You will run out of room for overall length in the mag box or magazine before you can get the overall length long enough to touch the lands and also feed from the mag box or magazine.
That's why I had my 7mm WSM throated for the heavier VLD Bullets and built it on a long action. The 190gr Matrix bullets are wicked stuff in it.