Ya I was going to ask how you used a magnet to collect lead or copper BB's.  I am getting some 33's and have been wandering about the balance problem. I start buying the quick silvers..I take a magnet with me too to make sure the BB's I buy are Steel.       Hell I just remembered. go to your local gun shot and buy a bag of steel shot for reloading shot gun shells. You can get any size you want 00 down to #10 shot...Sounds like it's time for a trip to the local Bass Pro Shop.