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300 HAM'R

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Bill Wilson designed this round from the ground up to provide maximum 30-caliber performance in the AR-15 platform while maintaining relatively high magazine capacity. In many ways it is similar to the 300 Blackout but is generally loaded with shorter bullets to achieve greater short-range energy.

The 300 Ham’R uses the same AR-15 lower and magazine as the 300 BLK. Pressure is 55,000 psi; so, with the right bullet and propellant, muzzle energy is similar to standard 30-30 factory loads but trajectory and long-range delivered energy are better because it uses generally more efficient bullets (higher BC). It is reasonable to look at the 300 Ham’R as a means of getting performance equal to the 30-30 with the AR platform.

Obviously, any chambering that approximates performance of the 30-30 when loaded with bullets that perform properly on impact will do anything the 30-30 has been doing so well for so long.


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.


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
91608
Lee RGB Die Set
Lee Full-Length Sizing Die Set
91564 (3-Die set)
Lee Breech Lock Die Set
Lee Ultimate 4-Die Set
Lee Loader
Single Dies
Full-Length Sizing Die
92167
Sizing Die
Neck Sizing Die
91636
Undersize Sizing Die
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90668 (Short Charging Die)
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Factory Crimp Die
91276 (Collet Style)
Taper Crimp Die
Inline Bullet Feed Die
91999 (30 CAL)
Die Accessories
Guided Decapper
91580
Undersized Flash Hole Decapping Mandrel
NS5334
Undersized Mandrel
90480
Case Conditioning Tools
Case Length Gauge and Shell Holder
91915
Quick Trim Die
91609
Presses
Reloader Press (50 RPH)
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Value Turret Press (250 RPH)
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Six Pack Pro Press (500+ RPH)
Shell Plates and Holders
Priming Tool Shell Holder
90204 (#4)
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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
91999 (30 CAL)
Inline Bullet Feed Kit
92011 (30CAL)
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