I don't know about how others do it, but if I do my part mine fuse together quite well. Keep in mind, I made these couple bullets in 10-15 minutes so I wasn't going for perfection. In the pictures you can see the center cross section of the bullets, the soft lead nose fused almost flawlessly with the hard lead. I also attempted to demonstrate the differences in lead hardness by digging my finger nail across both lead types. Hopefully you can see where my fingernail dug deeper into the nose, but in the body it became shallower to the point where it couldn't be scratched. Another thing to note for those that are making their own, although tempting...do not open your mold in between pouring the soft lead nose and the hard lead body it will miss align your bullets, that's the problem with casting a bunch of seperate noses then trying to add the body afterwards. Once you have practiced pouring the nose and have a pretty good idea how much lead is enough (for my 500 grainers...a .38 special 158 grain swc melted down is all I need +/- a grain or two) pour your body in the same mold.