I plan to shoot on Thursday with 40-160 LHP bullets I loaded today. Two are the original cast MP bullets, one round and the other hex. Another two are the same bullets but I hammered a phillips into it and filled it with caulk. i used a knife and curt a shallow slot from the hex closest to the rim then filled the cavity with caulk. I have jugs of water and one is filled with wet folded newspaper. The lead is mostly .22lr lead with a bhn of 10. If the bullets shatter, I plan to add tin. Any further suggestions for what to look for?