The Lee Precision 90251 Bench Plate System is a heavy-duty mechanical mounting plate designed to allow quick swapping of reloading presses and bench accessories without unbolting permanent hardware. Constructed from thick powder-coated steel with a black finish, the base plate spreads mechanical leverage over a wide surface area to minimise bench flex during high-pressure reloading operations. The system uses Z-bracket clamping hardware with elevator bolts and an alignment lock-pin hole to deliver zero-movement retention during heavy sizing tasks.

Key Features

• Quick-Change Mechanism: Enables sliding and swapping of different presses or benchtop tools in seconds without removing base fasteners.
• Heavy Load Distribution: The powder-coated steel base plate reinforces lightweight or thin benchtops by distributing mechanical downforce across a wide footprint.
• High-Calibre Leverage Support: Rated to withstand heavy-leverage resizing tasks up to .50 BMG when paired with compatible heavy-duty presses.
• Broad Factory Compatibility: Pre-drilled steel base block directly fits all current Lee metallic reloading presses manufactured after 2007, including the Classic Cast, Breech Lock Challenger, Load-Master, Pro 1000, Pro 4000/6000, and APP.
• Adaptable Mounting: Accommodates non-Lee presses or the Lee Load-All II by cutting custom 3/4-inch (17.5 mm to 19 mm) plywood blocks using downloadable templates.

Specifications

• Model / MPN: 90251
• Material: Heavy-gauge powder-coated steel
• Weight: 3.5 to 3.79 lbs (approx. 1.66 kg)
• Shipping / Envelope Dimensions: Approximately 11.5 in × 4.75 in × 2.5 in
• Base Block Dimensions: Approximately 1.55 in × 5.45 in × 11.65 in
• Power Requirements: None (purely mechanical)
• Bench Overhang Requirement: Minimum 1/2 in (12.7 mm) overhang over flush front cabinetry or drawers
• Bench Mounting Hardware Requirements: At least 1/4 in through-bolts with washers and nuts for tabletops up to 3/4 in (19 mm) thick; 5/16 in lag screws for tabletops 3/4 in (19 mm) thick or greater

Who is the Lee Precision Bench Plate for?

• Reloaders with limited bench space requiring multi-tool swapping workflows — benefits from this reloading press mounting plate's 3.5 to 3.79 lbs steel base design, which allows rapid tool changes on a single shared footprint without drilling multiple bolt patterns.
• Shooters resizing heavy rifle cases on space-constrained workbenches — leverages the plate's structural capacity rated to handle leverage loads up to .50 BMG while reinforcing tabletops measuring 3/4 in or less via mandatory 1/4 in through-bolt mounting.

Less suitable for: Reloaders who lack a permanent, fixed workshop benchtop entirely; users in this situation are better served by a dedicated free-standing reloading stand.