Three reasons to not worry about magnetic declination adjustment on a compass.
1. It changes from year to year for the same location.
2. If you travel for your hunting, it will be different from your home area.
3. You should get in the habit of using it instead of trying to dial and forget.
That being said, the only time you need to worry about magnetic declination is when transferring information back and forth between a compass and a map. If you use a compass as a stand alone navigation tool, you don't need to worry about it.
Get in the habit of knowing it and using it and you won't ever have trouble with it again.
http://www.magnetic-declination.com/http://www.ngdc.noaa.gov/geomag-web/
