recently I have been taking my weight swaged cores and jackets and heating them up until the lead melts in the jacket.
now I don't know if this is bonding the core to the jacket or not.
it looks like I am on about 95% of them but out of a batch of 500 or so I have about 5-6 that the core slides in the jacket.
the alloy of the core is 1-1.5% antimony and no tin.
I'm getting a good consistent scaling on the jacket which cleans up in the pin tumbler easy enough.
I'm also getting close to 700-f with the little tool I made and the heating element.
it's also fitting the core to the jacket better [better fill out] than core seating alone.
do I need to add something like a paste flux to the jacket?