.338-378 Weatherby Magnum Reloading Essentials

This two-die set is intended for reloading bottleneck cases, and consists of a Full-Length Sizer Die with an Expander-Decapping Unit, and a Seater Die with Bullet Seater Plug. The Full-Length Sizer Die brings the case to SAAMI minimum cartridge dimensions. It sizes the outside of the case, de-primes and expands the neck to accept the bullet. The die has vents to prevent case damage caused by trapped air and for excessive lubricant. Headspace is held to minimum tolerances to avoid changing the case body length during full length sizing. The included Seater Die has a built-in roll crimper to secure the bullet at the same time as it’s seated.

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• Standard 7/8"-14 Thread
• Proprietary Die Steel
• Set includes Full-Length Sizing die and Bullet Seating Die
• Sizing die brings cases to SAAMI minimum cartridge dimensions
• Ships in Green Die Box

RCBS Single Stage shell holders are built from hardened steel and designed to properly align the case with the reloading die in single-stage and turret presses. They’re sized to fit specific case heads and capture 0.125 inch of the case head for proper SAAMI headspacing.

• .45-70 U.S. Government
• .30-378 Weatherby Magnum
• .338 Lapua Magnum (With Lapua Brass)
• .338-378 Weatherby Magnum
• .378 Weatherby Magnum
• .40-65 Shiloh-Sharps - .408"
• .45-90-2.4" Sharps Straight
• .45-100-2.6" Sharps Straight
• .45-110-2 7/8" Sharps Straight
• .45-120-3 1/4" Sharps Straight
• .460 Weatherby Magnum
• RCBS shell holders are built for Single Stage and Turrets Presses.
• RCBS shell holders are manufactured to exacting tolerances.
• RCBS shell holders are hardened for years of use.
• RCBS shell holders ensure proper alignment between the cartridge and die.
• The Shell holders are cut to .125" depth for proper headspacing.
• RCBS Limited Lifetime Warranty.