Lyman's custom fit loading blocks are designed to provide a precise fit for a family of cartridge sizes. Made from tough, durable polymer, the loading blocks hold 50 cartridges and will securely nest together for easy storage. The blocks come in three sizes to match up with a large variety of cartridges. Each block is clearly marked with the diameter of the cartridge storage hole.

The 615 block fits the following:

• .30-378 Weatherby Magnum
• 7.62x54R
• .338-378 Weatherby Magnum
• .338 Lapua
• .348 Winchester
• .378 Weatherby Magnum
• .40-65 Winchester
• .416 Rigby
• .416 Weatherby Magnum
• .45-70 Government
• .45-90 Sharps
• .45-100 Sharps
• .45-100 Sharps
• .45-120 Sharps
• .460 Weatherby Magnum