Here's how I do it. Rod
Snake Loads for a Handgun
I make up "snake" loads for my revolvers using #12 or #9 shot. In a .38 Spl or .357, they'll reliably kill snakes out to about 8-10 feet. In .45 LC or one of the .44's, they're even more effective. Here's my procedure.
1. I size and recap the empty case as normal, then load the powder charge matched to the weight of shot I'm going to use. 3.5 gr's of Bullseye works well in .38 Spl. for instance.
2. I place a piece of coffee can lid (the soft plastic type from a metal coffee can) over the mouth of the recharged case. Sitting the case upright on an absolutely flat metal surface (the anvil portion of my bench vise works well), I lightly tap the wooden block with a small hammer. The block allows the case to cut its own individual wad from the coffee can lid. No "sharpening" of the case is necessary beyond a chamfer as is normally used in reloading.
3. This wad is pressed down on the powder charge using a wooden pencil's eraser end. If you make a pin hole in the wad, it'll allow the air to escape making seating easier. You want the 'over powder wad' right down on the powder. I use two over powder wads to ensure a good gas seal.
4. I then dip the case in a tray of shot till it's filled to about 1/16" from the top, allowing for another coffee can wad to be cut and seated. I then lightly crimp the case and apply a sealant to the edge of the over-shot wad; made of Testor's model airplane paint or Crazy Glue. This helps keep the slick wad from working loose in pocket or shell loop.
Using the primed and charged case to cut its own wad sounds risky till you try it out. It's fine in reality, just be sure to use a good solid, absolutely flat surface.
These shot loads work well on snakes, or as non-lethal loads against canine attackers or in the barn where you don't want to put a hole in the roof shooting pigeons. The #12 shot is good for these purposes, but can be hard to obtain. I bought 5 lbs. 20 years ago and haven't made a dent my supply yet. My friends and I have put the final chapter to half a dozen rattlers and copperheads using the above assembled loads. Leading has not been a problem in the snubbies we've used to date.
As to using cardboard for wads, I could never find an effective wad cutter. The sharpened case method didn't work at all...The soft plastic wads I use are thin enough, not to limit the amount of shot I could fit in the smaller cases and were effective as a gas seal. Be sure to weigh the shot in the first one you make up, to be sure of a safe powder charge. The pattern at 8 feet for a .38 Spl. using #12 shot is about a foot across, but does have some holes in it, presumably from the rifling. For that reason, if I'm fishing down in the Carolinas, I carry a M-36 Smith Chief's special with 3 shot cartridges and two hollow points. I shoot twice at the snakes, then check for damage. If they need finishing, I've got the last round and the two HP's.