HEre's what I do ...
1. Remove the stock and clean the bijeebers out of the receiver and latching mechanism with break cleaner (removing the stock keeps you from having to refinish the stock :shock: )
2. Polish the barrel with JB's, flitz, etc. As mentioned above.
3. Remove the scope mount (if using one) and either use lock-tite, or clear fingernail polish. I use finger-nail polish. When mounting the scope, secure all the scope ring screws the same way.
4. Go to Graybeards and do a search for caliber-specific information about loads that are working with handi rifles others have. For example, for .223's try the 45gr. white box winchester's first, for the .243, try bullets UNDER 100 gr. first, for the 44mag, be prepared to work with bullets that will fire with a bore of .431 or better in dia. You get the picture.
5. SHOOT, SHOOT, SHOOT, and SHOOT some more and discover what YOU particular handi likes.
6. Try the o-ring trick for comparison after you get what you think is your best load. I did this with my .223 and discovered my best load was better with the o-ring.
7. Come back and share with us, what worked for you. This is MANDITORY for entrance into the Handihilics Anonymous Society here are Graybeards.
8. HAVE FUN out-shooting lots of the bigger, more expensive guns at hunting camp and the range!
Well, that's what I do, others may have some different ideas ... :-D