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9x21

New drawing Coming

In 1980, the 9×21mm was standardized. It goes by many names. Regardless of which moniker is applied, this is merely the 9×21mm Luger with case length increased by 2-mm (0.080-inch) but using almost the same cartridge overall length. As standardized, pressure is a bit less in the 9×21, compared to the 9×19.

USPSA and IPSC shooters once used this chambering as a means of assuring that their high-pressure handloaded munition did not get used in any standard 9×19 chambered pistol.

This was a good idea because many of them used loads combining very light bullets and very high velocity to reduce recoil while still achieving the critical Major-Power-Factor criteria. Such loads required extremely high pressure. This standard was based on momentum, so the lighter the bullet the lower the felt recoil and the faster the shot-to-shot recovery time for any given power factor.

When loaded to SAAMI-specification pressure ballistics of the 9×21 and 9×19 are indistinguishable.


As with any pistol round headspacing on the case mouth, best practice is to apply a taper-crimp after seating the bullet. This helps to lock the bullet in place against chambering forces that might otherwise drive it into the case. I cannot too-strongly recommend getting a second seating-and-crimping die so you can have one adjusted to seat the bullet and the second adjusted to only taper-crimp the case mouth. Generally, attempting to do both operations in one step is a recipe for damaged and destroyed cases.


The text associated with the cartridge description reflects opinions and conclusions of the author, M.L. (Mic) McPherson. Lee Precision and its employees do not necessarily either agree or disagree with any of his comments. We present these with due deference to his recognized expertise in the firearms field. His acumen extends to handloading and all aspects of ballistics - internal, external, and terminal.
Die Sets
Lee Collet Necksizing 2-Die Set
Lee Full-Length Sizing Die Set
91891 (3-Die set)
Lee Breech Lock Die Set
Lee Loader
Single Dies
Full-Length Sizing Die
Steel Sizing Die
91620
Undersize Sizing Die
Powder through Expanding Die
Charging Die
Seating Die
Factory Crimp Die
Taper Crimp Die
Inline Bullet Feed Die
91995 (35CAL)
Die Accessories
Guided Decapper
Case Conditioning Tools
Case Length Gauge and Shell Holder
Quick Trim Die
Presses
Reloader Press (50 RPH)
Hand Press (50 RPH)
Challenger Press (50 RPH)
Classic Cast Press (50 RPH)
Value Turret Press (250 RPH)
Classic Turret Press (250 RPH)
Ultimate Turret Press (250 RPH)
Pro 1000 Press (500+ RPH)
Pro 4000 Press (500+ RPH)
Six Pack Pro Press (500+ RPH)
Shell Plates and Holders
Priming Tool Shell Holder
90023 (SHELL HOLDER #19 )
Universal Press Shell Holder
90004 (R19)
X-Press Shell Holder (APP)
91552 (#19)
Pro 1000 Shell Plate
90669 (#19)
Auto Breech | Pro 4000 Shell Plate
90944 (19)
Six Pack Pro Shell Plate
91851 (19S)
Inline Bullet Feed
Inline Bullet Feed Die
91995 (35CAL)
Inline Bullet Feed Kit
92007 (35CAL )
Inline Bullet Feed Magazine
92015 (Medium Inline Bullet Magazine)
Bullet Casting
Classic Bullet Sizing Kit
Breech Lock Bullet Sizer and Punch
Bullet Molds

Challenger III

From $117.00

Ultimate Turret Press

From $320.00

Deluxe APP Press Kit

91898

The Lee Deluxe Automatic Processing Press gives you the same priming convenience found only on expensive progressive reloading presses.

$155.00

Six Pack Pro Press

From $400.00