Try .006" into the lands from where you can just barely detect lands marks on the bullet in your "Dummy" round. Adjust your powder by .02g until you have zero groups. If your barrel is any good, you can get there. From my experience, the Jam most folks use is allready .15" into the lands. The nice part of the .006 " I mentioned is you will be able to remove a loaded round without the bullet sticking and I have almost always found my best accuracy at the .006" setting.