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223 Ackley Improved

New drawing Coming

Following earlier Ackley-Improved designs, the 223 Ackley Improved uses reduced case-body taper and increased case shoulder angle, compared to the 223 Remington.  This provides a useful if modest ballistic improvement.

The one thing it cannot fix is the too-short case neck that significantly limits useful barrel life, which matters to many varmint hunters.

A vastly superior option is rechambering to 222 Remington Magnum AI.  This is less expensive because it requires no barrel modifications other than running the 222 Rem Mag AI reamer into the existing 223 barrel the needed depth to give correct headspace.  Lee Precision will make the needed dies.

Refer to the discussion about the 22-250 AI to understand what correct headspace is with an AI chamber.

The heritage of this case dates to the 38 Colt cartridge of the 1860s and before that with the 1839 introduction of the 36 Colt Paterson cap-and-ball Revolver.


Die Sets
Lee Collet Necksizing 2-Die Set
90707
Lee RGB Die Set
Lee Full-Length Sizing Die Set
90981 (3-Die set)
Lee Breech Lock Die Set
Lee Ultimate 4-Die Set
Lee Loader
Single Dies
Full-Length Sizing Die
91117
Sizing Die
Neck Sizing Die
90954
Undersize Sizing Die
Charging Die
90668 (Short Charging Die)
Seating Die
Factory Crimp Die
Taper Crimp Die
Inline Bullet Feed Die
91998 (22CAL )
Die Accessories
Guided Decapper
91576
Undersized Flash Hole Decapping Mandrel
Undersized Mandrel
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
90204 (#4)
Universal Press Shell Holder
90521 (R4)
X-Press Shell Holder (APP)
91537 (#4)
Pro 1000 Shell Plate
90653 (#4S)
Auto Breech | Pro 4000 Shell Plate
90630 (4)
Six Pack Pro Shell Plate
91838 (4S)
Inline Bullet Feed
Inline Bullet Feed Die
91998 (22CAL )
Inline Bullet Feed Kit
92010 (22 CAL)
Inline Bullet Feed Magazine
92014 (Small Inline Bullet Magazine)
Bullet Casting
Classic Bullet Sizing Kit
Breech Lock Bullet Sizer and Punch
91506
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