Does the Redding 75874 Body Die resize or touch the case neck of my .338 RUM brass?

No, the internal neck area of this body die is bored out specifically to avoid contacting or sizing the neck. This preserves your carefully tuned neck tension or fire-formed neck dimensions while allowing you to bump the shoulder and restore tight brass for smooth chambering.

What shellholder do I need to use with the Redding .338 Remington Ultra Magnum Body Die?

This die requires a Redding Shellholder #6 (Part #11006) or the Redding Competition Shellholder #11606, which are sold separately. It features an industry-standard 7/8"-14 thread interface to fit most standard reloading presses.

Can I use this body die to deprime my fired .338 Remington Ultra Magnum cases or resize loaded ammunition?

No, this die does not deprime or size the neck, and it features a hollow body design without a decapping rod or expander ball. Furthermore, the manufacturer explicitly states that body dies must never be used to resize loaded live rounds.

Will this die work for other .338 calibres like the .338 Lapua Magnum or .338 Winchester Magnum?

No, the Redding 75874 is built strictly for fired brass in .338 Remington Ultra Magnum (.338 RUM) and will not properly size other .338-calibre cartridges.

338 RUM Body Die - Redding 75874

The Redding 338 Rum Remington Ultra Magnum Body Die (Manufacturer SKU: 75874) is a specialised reloading tool designed to resize the case body and bump the shoulder back on fired .338 Remington Ultra Magnum brass. Machined from heat-treated alloy steel on precision lathes, this non-powered mechanical die features an industry-standard 7/8"-14 thread interface to fit standard reloading presses. Its hollow internal cavity is designed to restore critical case dimensions and proper headspace for reliable chambering without contacting or altering the case neck.

Key Features

Dedicated Body Resizing and Shoulder Bump: Restores fired brass to functional chamber dimensions and sets the shoulder back without altering the neck diameter.
Neck Preservation Geometry: Features an open internal neck area without an expander ball, decapping rod, or bushing, maintaining custom neck tension and fire-formed neck dimensions.
Companion Reloading Tool: Designed to work alongside neck-sizing dies, such as bushing and neck dies, when repeatedly fired brass becomes difficult to chamber.
Standard Press Integration: Includes a standard locking ring and mounts securely to standard reloading presses via an industry-standard 7/8"-14 thread.

Product Specifications

Cartridge Compatibility: .338 Remington Ultra Magnum (.338 RUM)
Thread Interface: 7/8"-14 thread
Material: Heat-treated alloy steel
Internal Design: Hollow body design (no decapping rod or neck expander ball)
Shellholder Compatibility: Redding Shellholder #6 (Part #11006) or Redding Competition Shellholder #11606 (sold separately)

Who is the Redding 338 Rum Remington Ultra Magnum Body Die for?

Handloaders reloading precision .338 Remington Ultra Magnum ammunition — requires a 338 RUM body reloading die to bump the shoulder and resize the outer case body to correct headspace dimensions on .338 Remington Ultra Magnum cases without disturbing custom neck tension.
Reloaders utilizing neck-sizing dies — requires an auxiliary die using a standard 7/8"-14 thread interface to restore easy chambering on tight, repeatedly fired .338 Remington Ultra Magnum cases while preserving the fire-formed neck.

Less suitable for: Handloaders seeking single-step full-length sizing and depriming in one operation (a full-length sizing die with an integrated decapping assembly is required), users looking to resize other .338-calibre cartridges like .338 Lapua Magnum or .338 Winchester Magnum, or anyone attempting to resize loaded live ammunition (which must never be processed in this die).

SKU	RD41806LP
Model #	75874
Brand	Redding
Shipping Weight	1.0000kg

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Redding 75874 Body Die 338 Remington Ultra Magnum 7/8-14 Thread

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