I'm new to this forum,and have a little casting experence,but not much. I'm using a 50/50 mix of wheel weights,and pure lead. These bullets are for shooting in a muzzeloader,with a sabot. I can't seem to get the mold to fill out,the bullets come out undersized. I need them to fill out the bullet so it can be sized to .430. The mold made perfect bullets with a Lyman #2 mixture,but now it won'twith this mixture. Any ideas would be appreciated. Thanks Ron