You mention touching the lands.....for a beginner you need to understand what happens when you do that.....inching out the bullet is somthing we all do...when you do that you increase case volume and pressure goes down with a given powder charge..but as you get closer to the lands spike pressure gets sharper.....what we want to do is get a gradual increase to peak pressure....I find this to never be touching the lands...it's usually off the lands some....this is speaking of hunting bullets only....lots of target bullets like the lands..
Every rifle has the magic sweet spot for this....I have seen guys sell guns because they refuse to back the bullet off the lands...and they just didn't shoot well there..
Good luck and ask lots of questions