Worst idea yet. M43 uses a mild steel core, a thin layer of lead and a copperwashed steel jacket. The lead is to allow compression as the rifling engraves the bullet. It is fmj not cmj. I.e. the jacket is open at the base. There is a very good chance the core would seperate in the bore as the gas pressure would surely cause. Firing a second round could be catastrophic if much is left in the bore. Even if the bullet remained intact until impact, the jacket would seperate and terminal performance would be a roll of the dice. Please do not do this.