A few regulars in this forum have asked, either through PM or in some of the threads, what is involved in handloading/reloading ammunition.
What follows is a pictorial summary of the handloading process. Bear in mind this is the process
I use for handloading pistol ammunition; other handloaders might have different methods, techniques and/or equipment. Note also that the process for handloading rifle ammunition involves a few additional steps.
This is generally what fired brass looks like: dirty and grungy, with carbon build-up around the case mouth. If you look carefully, you will notice there are some 9mm and 380ACP brass mixed in with the majority of the 40S&W cases.
The dirty brass is thrown into a tumbler to be cleaned. The bowl of the tumbler contains cleaning media (in this case, crushed corn cob impregnated with kerosene). When the tumbler is switched on, a motor vigorously vibrates the bowl and its contents, causing the corn cob to rub against the brass and "scrub" it clean.
This is what the brass looks like after a couple of hours in the tumbler. I've removed the non-40S&W brass.
The case is placed on the shellholder atop the ram of the reloading press and pushed into the bottom of the resizing die screwed into the top of the press. This resizes the case; at the same time, a pin inside the die punches out ('decaps') the spent primer at the bottom of the case.
The decapping process removes the old primer, but doesn't clean out the primer residue from the primer pocket of the case. Though not really necessary, I like to clean out the primer pocket to prevent the residue from possibly contaminating the powder. It's an extra step that doesn't take up too much extra time.
The inside neck of each case is then deburred with a chamfer tool pressed against the case mouth and twisted a few times. This allows the projectile to seat more easily.
The empty cases are them primed. I prefer to use a handheld priming tool for this step.
The handheld priming tool in action. An unprimed case is placed on the shellholder and a single primer from the tray is pushed into the primer pocket when the lever is pressed.
The cases at the top are all primed and ready to be charged with powder. The ones at the bottom have yet to be primed.
This is the equipment I use to charge the cases with powder.
The powder dispenser is loaded with powder and adjusted to drop the desired amount of powder into the case with each crank of the handle.
Gunpowder is not always of a uniform density, and the slight variations thereof can cause the charge weight to drift gradually during a single charging session. A weighing scale, like the one pictured here, is used to confirm that the powder dispenser is throwing the correct charge with each crank. I typically check-weigh every tenth charge dropped by the powder dispenser; in the image, the scale shows a charge weight of 5.4 grains, which is exactly what I want from the powder dispenser.
The cases have been charged and are now ready to have the projectiles seated into them.
With a bullet seating/crimping die screwed into the press, a charged case with a projectile placed loosely atop it is placed on the shellholder and then carefully pushed into the bottom of the die. The projectile is pressed into the case to a preset depth. In addition, at the top of the stroke, after the projectile is fully seated, the case mouth is pressed lightly into the jacket of the projectile to help retain the projectile and prevent it from sliding farther into the case when the cartridge is forcibly fed from the magazine into the chamber of the pistol.
The length of each completed cartidge is measured to ensure that it is within specs. If a projectile is accidentally or otherwise seated too deep, it reduces the amount of volume in the case for the powder, and when the powder ignites, it will have less room to combust, driving pressures beyond safe levels and possibly causing the cartridge to rupture in the barrel chamber. When this happens, the pistol is almost always damaged or destroyed, with the possibility of serious injury to the shooter.
In this image, the overall length of the cartridge measures exactly 1.145", which is what my recipe calls for.
Voilà ! A precision handloaded and customized 40S&W cartridge which costs less than and will handily outperform even the most expensive commercially loaded 40S&W ammo!