I was talking to Greythorn3 the other day and he mentioned how expensive his .410 was to shoot, so I decided that I should share this easy way to reload .410 shells with common tools. Most people don't shoot their .410 enough to justify spending $150 for a press, but $10+ for a box of shells gets expensive fast. As long as you shoot the shells in the same shotgun, you shouldn't need to resize them.
First the disclaimer: Reloading is done at your own risk. If you blow your fingers off, don't point the blame at me. Get a reloading book and stick with the recipes given there or on Hodgdon.com
The pictures for each step are linked at the bottom.
1. Place the hull over a 5/16" socket. Using a small punch, tap out the old primer.
2. Slide the hull over a bit driver*. Press the hull down onto the new primer until it sits flush.
*Not all bit drivers will fit into a .410 hull. Anything that will fit into the hull, but leaves room for the primer in the middle will work. Be careful not to stretch the hull or it won't chamber properly.
3. Measure the proper amount of powder according to the recipe you chose. Magnum pistol powders like H110/296 are commonly used. Use a small funnel to pour it into the hull.
4. Use the punch to seat a wad firmly over the powder. Most .410 wads are the same for all hulls and loads, both 2 1/2" and 3" hulls.
5. Measure the proper amount of shot and pour it in over the wad.
6. Start the crimp by hand using the existing folds.
7. Push a 7/16" 1/4 drive socket down over the crimp (6 point sockets fit better). Push until the crimp comes together, then use the punch through the hole in the socket to invert the crimp slightly. Sometimes I push the finished shell into the small funnel to shrink the crimped area if it got stretched.
That is all there is to it. Always use standard safety practices when reloading. I hope this helps some people save a little bit of money. If you need pictures to make any step make more sense, click here: