What reloading presses are compatible with the Lyman Die Set 50/70 Government?

This die set features an industry-standard 7/8"-14 thread pitch, making it fully compatible with single-stage, turret, and progressive reloading presses from major brands like Lyman, RCBS, Redding, Lee Precision, and Hornady. Because it is a purely mechanical tool, no electrical power or Australian regulatory compliance marks such as SAA or RCM are required.

Does this die set include everything needed to reload .50-70 Government cases, and do I need case lube?

The set includes a 3-piece sequence comprising a full-length sizing die with a decapping stem, a two-step neck expanding "M" die, and a bullet seating die specifically tailored for the 1.75-inch straight-walled case. Because these are hardened steel dies rather than carbide, you must apply appropriate case lubrication prior to full-length sizing to prevent stuck cases on your reloading bench.

Can I use the standard expander plug for oversized antique rifle bores?

The standard Lyman "M" die expander is typically factory-sized for nominal bullet diameters ranging from .512" to .515". If you are reloading for antique or reproduction firearms with oversized bores exceeding .515" groove diameter, you will need to acquire a custom large-diameter expander plug to prevent shaving cast lead bullets.

Are these dies suitable for modern bottleneck cartridges like the .45-70 Government?

No, this die set is strictly engineered for straight-wall .50-70 Government (also known as .50-70 Musket) ammunition used in historic black-powder rifles like the Springfield Trapdoor and Remington Rolling Block. For .45-70 Government or other bottleneck and modern standard calibres, you must use dedicated caliber-specific die sets such as the Lyman 45-70 set.

50-70 Rifle Die Set - Lyman LY-5070

The Lyman Die Set 50/70 Government (Manufacturer Part Number: 7660121, Internal SKU: LY-5070) is a three-die rifle reloading set precision-machined from hardened, polished steel. Designed specifically for straight-walled .50-70 Government (also known as .50-70 Musket) brass cases with a nominal 1.75-inch case length, this set manages full-length case resizing, neck expansion, and projectile seating. It utilizes an industry-standard 7/8"-14 thread pitch to ensure direct compatibility with standard single-stage, turret, and progressive reloading presses.

Key Features

Three-Die Straight-Wall Configuration: Includes a full-length sizing die with an integrated decapping stem, a dedicated two-step neck expanding die, and a bullet seating die.
Lyman Two-Step "M" Expander Die: Steps and flares the case mouth precisely to facilitate true-centre starting of cast lead or jacketed bullets without shaving lead or distorting the brass.
Standard Press Mounting: Uses a 7/8"-14 thread pitch to fit all standard reloading presses without the need for thread adapters.
Standard Bullet Sizing: Engineered to expand cases for nominal .512" to .515" bullet diameters.
Steel Construction: Built from polished, hardened steel with a total shipping weight of approximately 0.5 kg.

Specifications

Calibre: .50-70 Government (.50-70 Musket)
Thread Pitch: 7/8"-14
Die Set Style: 3-Die Set (Full-Length Sizer, "M" Expander, Bullet Seater)
Case Length Compatibility: 1.75 inches
Nominal Bullet Diameter Compatibility: .512" to .515"
Die Material: Hardened, polished steel (case lubrication required)
Shipping Weight: 0.5 kg (1.1 lbs)

Who is the Lyman Die Set 50/70 Government for?

Historic Black-Powder Cartridge Rifle Shooters — Provides full-length resizing, two-step flaring, and seating for .50-70 Government cases with standard 7/8"-14 threads to reliably handload ammunition for original or reproduction 1866/1873 Springfield Trapdoor, Remington Rolling Block, and Sharps rifles.
Antique Firearm Handloaders — Delivers a dedicated 3-die rifle reloading set designed to correctly expand straight-walled 1.75-inch cases for nominal .512" to .515" diameter cast lead bullets without shaving material at the case mouth.

Less suitable for: Firearm barrels with oversized groove diameters exceeding .515", which require custom large-diameter expander plugs, as well as distinct modern or bottleneck calibres (such as .45-70 Gov or .30-30 Win) that require caliber-specific two-die or three-die sets.

SKU	LY39893LP
Model #	LY-5070
Brand	Lyman
Shipping Weight	1.0000kg

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Lyman Ly-5070 Rifle Die Set 50-70 Government 3-Die M-Die

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