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300 Remington Ultra Magnum

300_rum

Introduced by Remington in 1999, the 300 Remington Ultra Magnum (RUM) is an oddball ballistically.

Some early Remington rifles in this chambering were astonishingly accurate, particularly so with well-tuned handloads.  Some of the most accurate factory rifles I have seen were chambered for this round.  As such, it can serve the hunter well, despite my comments about the limited ballistic benefit over lesser 30-caliber magnum chamberings.

While barrel life is not much of a consideration for most big-game hunters, it does matter.  Because, compared to the 300 Win Mag, the 300 RUM has a longer neck and sharper case shoulder, it probably has similar barrel life but it would certainly do better in that regard if the case body were 0.1-inch shorter so the neck could be 0.1-inch longer, which with loads using available propellants would have given the same velocity with a lighter charge.


Die Sets
Lee Collet Necksizing 2-Die Set
Lee RGB Die Set
Lee Full-Length Sizing Die Set
90698 (3-Die set)
Lee Breech Lock Die Set
Lee Ultimate 4-Die Set
Lee Loader
Single Dies
Full-Length Sizing Die
91083
Sizing Die
Neck Sizing Die
Undersize Sizing Die
Charging Die
Seating Die
91445
Factory Crimp Die
90970 (Collet Style)
Taper Crimp Die
Inline Bullet Feed Die
Die Accessories
Guided Decapper
Undersized Flash Hole Decapping Mandrel
Undersized Mandrel
Case Conditioning Tools
Case Length Gauge and Shell Holder
90141
Quick Trim Die
91366
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
90205 (#5)
Universal Press Shell Holder
90522 (R5)
X-Press Shell Holder (APP)
91538 (#5)
Pro 1000 Shell Plate
Auto Breech | Pro 4000 Shell Plate
Six Pack Pro Shell Plate
91840 (5L)
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

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