The 25-303 cartridge is a wildcat round, created by modifying the standard .303 British cartridge case to accept .257 caliber (6.5mm) bullets. This involves necking down the .303 British case to the smaller diameter. The 25-303 is relatively obscure and not commonly found in commercial production; it's often hand-loaded by enthusiasts who are looking for a unique cartridge with good ballistic performance for hunting or target shooting.
The cartridge was developed to provide shooters with a flatter trajectory and higher velocity compared to the original .303 British round, making it suitable for medium game hunting in regions where the .303 British is traditionally used. Given its wildcat status, users typically have specialized reloading equipment and knowledge.
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Lee Collet Necksizing 2-Die Set |
Lee RGB Die Set |
Lee Full-Length Sizing Die Set |
90793 |
Lee Breech Lock Die Set |
Lee Ultimate 4-Die Set |
Lee Loader |
Single Dies |
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Full-Length Sizing Die |
91136 Ez X Expander: SE2540 |
Sizing Die |
Neck Sizing Die |
Undersize Sizing Die |
Charging Die |
90194 (Long Charging Adapter) |
Seating Die |
91448 |
Factory Crimp Die |
91491 (Collet Style) |
Taper Crimp Die |
Inline Bullet Feed Die |
Die Accessories |
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Micrometer Adjuster |
92215 |
Guided Decapper |
Case Conditioning Tools |
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Case Length Gauge and Shell Holder |
Quick Trim Die |
Presses |
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Reloader Press (50 RPH) |
Hand Press (50 RPH) |
Challenger Press (50 RPH) |
90588 (Challenger III) |
Classic Cast Press (50 RPH) |
90998 (Classic Cast Press) |
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 |
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Priming Tool Shell Holder |
Universal Press Shell Holder |
X-Press Shell Holder (APP) |
Pro 1000 Shell Plate |
Auto Breech | Pro 4000 Shell Plate |
Six Pack Pro Shell Plate |
Inline Bullet Feed |
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Inline Bullet Feed Die |
Inline Bullet Feed Kit |
Inline Bullet Feed Magazine |
Bullet Casting |
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Classic Bullet Sizing Kit |
Breech Lock Bullet Sizer and Punch |
Bullet Molds |
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