Go to your saved Cartridges

Your Armory

  • Your Armory is empty.

Can't find what you're looking for? Open a ticket and we will help you find it!

6MM-223

New drawing Coming
The 6MM-223 cartridge, also known as the 6x45mm, is a wildcat round based on the .223 Remington case. It is modified by necking up the .223 Remington to accept a 6mm (.243 caliber) bullet. This modification increases the cartridge's versatility and performance, allowing it to deliver flatter trajectories and greater energy than the standard .223 Remington.
This cartridge is used primarily in benchrest shooting, varmint hunting, and target shooting due to its improved ballistic performance and manageable recoil. It can effectively be utilized in AR-15 platforms with appropriate barrel changes. The 6MM-223 combines the high velocity and energy retention of the 6mm bullet with the widespread availability and familiarity of the .223 Remington casing.
Reloaders favor the 6MM-223 for its customizability and the ease of forming brass from the readily available .223 Remington. It’s a good choice for medium to small game hunting, including predators and varmints, as well as for competitive shooting disciplines where accuracy and consistency are crucial.
However, as a wildcat cartridge, factory ammunition is generally unavailable, requiring shooters to handload their rounds.

Die Sets
Lee Collet Necksizing 2-Die Set
Lee RGB Die Set
Lee Full-Length Sizing Die Set
Lee Breech Lock Die Set
Lee Ultimate 4-Die Set
Lee Loader
Single Dies
Full-Length Sizing Die
Sizing Die
Neck Sizing Die
Undersize Sizing Die
Charging Die
Seating Die
Factory Crimp Die
Taper Crimp Die
Inline Bullet Feed Die
Case Conditioning Tools
Case Length Gauge and Shell Holder
90493
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
Auto Breech | Pro 4000 Shell Plate
90630 (4)
Six Pack Pro Shell Plate
91838 (4S)
Inline Bullet Feed
Inline Bullet Feed Die
Inline Bullet Feed Kit
Inline Bullet Feed Magazine
Bullet Casting
Classic Bullet Sizing Kit
Breech Lock Bullet Sizer and Punch
Bullet Molds

Micrometer Adjust Screw

From $20.00

Power Grip Shell Holder

92149
$10.00

Challenger III

From $117.00

Ultimate Turret Press

From $320.00

Deluxe APP Press Kit

91898

Includes:

  • Press
  • Roller Handle
  • Priming System
  • Universal Case Feeder
  • APP Deprime Kit
  • Bottle Adapter
$155.00

Six Pack Pro Press

From $400.00