This applies only in two circumstances: First, the bullet is loaded normally, base down, and, Second, to higher than standard pressure for a target load.
If the bullet is loaded hollow base forward, with the solid nose now forming the bullet base, how would you suggest the shirt could pull off and the solid base, being behind the skirt, be blown out leaving the skirt in the bore????????
Yes, they will lead. Expansion is spotty. Other than these go ahead and try it, it has been done for many, many years with no particular problems. Just be sure to only seat the bullet as deep in the case as a 158 semi-wadcutter would be, approximately the center cannellure. Don't try full loads with the bullet seated flush with the case mouth, it will give excessive pressure with even standard loads to do so.