The man i bought the rifle give me a box of maxi-balls and maxi-hunters. They are so old the grease on them has turned white and gotten hard and falling off. What do you use to re-lube them? I was told that once you leaded a barrel you could never get it out, but I am glad to hear that is not the case. What are ya'lls cleaning method with sighting and shooting maxi-balls for example?