When practicing, keep practicing the exagerated inside-out swing. Then, after a few times out on the range, swing without thinking about swinging inside-out. I will bet that you are swinging inside-out or inside-square-inside. The prupose of drills are to exagerate the feelings, not to mold the swing perfectly. Every player is different, therefore your swing is a bit different. Make your swing your own with drills and finding which techniques work best for you.