lead solvent?

[PJgunner]

Rocky is absolutely right on not trying to clean lead out by shooting jacketed bullets. With mild leading, all you're going to do is iron the lead into the pores of the steel making it very difficult to remove, if at all possible now that having mercury is a no-no.
Second, if really heavy leading is present, you can damage a bore or even ruin a gun by trying to shoot the lead out with a jacketed bullet. early .357 mag lead bulleted ammo leaded like crazy and a friend buldged the barrel of he Colt Python trying to "get the lead out" using jacketed bullets.
I still have a box of Winchester .357 Mag. ammo from the mid 1960s and those lead bullet will smear all over a barrel and be badly leaded in less than a dozen shots. Time to find some mercury if you shoot those.
Paul B.