I've been experimenting with my .22RF jacketed bullets shooting into water jugs. I don't have a way of determining the lead core hardness but the guy I bought it from said it was "soft". It seems to be soft just scratching it. My various bullets seem to explode & sometimes don't even exit the back of the jug. Great for small varmint like PD's but I'd like to get more penetration for bigger critters. What's the hardest lead recommended that won't damage the dies? Wheel weights? Linotype? Your thoughts & experiences are most appreciated.