I use tumble lube bullets almost exclusively. I shoot .41 mag at 1300 FPS with no problems of leading. I shot some .357 yesterday at about 1200 FPS out os a 6 inch revolver. No lead. I was using AA#9 which happens to be my prefered powder for magnum loads both jacketed, and cast lead.
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No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.
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