Like most pistol cartridges, the 40 S&W headspaces on the case mouth. When loading for this cartridge, bell the case mouth just enough to reliably guide the bullet into position and then secure the bullet with a taper crimp. Using this seating and crimping technique will help ensure proper headspacing.
The favorite all around 40 S&W load in our Ballistics Lab consists of our 135 grain bullet and Blue Dot. All of the standard small pistol primers available give good results with this combination.
The S.A.A.M.I. overall cartridge lengths for this cartridge are 1.085” min. and 1.135” max. Seating to anywhere in this range is acceptable, provided that the rounds will function well in your particular firearm.
This is loaded ammunition.
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