I use that mouse killer it comes in a poptart looking bag full of little green pellets.the mice eat it and then leave the area in search of water.I also use pb on snapper traps.I have a electronic gizmo that plugs in and it doesnt work a crap.Kill em all and keep them away from all GN's.
I would load up with 2 pellets of 50 gr.each for a total of 100gr of powder.Get the new style sulfer free called "777".The best projectiles are the power belt bullets available for .45 in a few different weights.