What a wonderful thread.
OP,
If possible, get someone who knows how to do it to show you how to do it. As mentioned by Topstrap, you are chasing your shots. Since you are unknowledgeable about what's important to good shooting; and, your emphasis is apparently only on maintaining a reticle/target relationship, it's likely that you are adjusting your scope for a multitude of shooter errors, which you are incorrectly analyzing or associating with a need for scope adjustment to hit where aimed. Without help you could shoot a mountain of ammunition without ever producing a group or getting a good zero. The big picture here is that you just do not know what you need to know; and, without some help, your practice schedule will be futile.
The USAMU will conduct the rifle phase of this years Small Arms Firing School at Camp Perry on July 26, 27, and 28. You can attend this marksmanship clinic for about $45. Attendees will be given training on everything there is to know about what's important to good shooting. This would get you off to a good start. For information on SAFS go to odcmp.com.