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 565 block fits the following: .

• .223 WSSM
• 243 WSSM
• .25 WSSM
• 264 Winchester Magnum
• 264 Winchester Magnum
• .26 Nosler
• .270 WSM
• .270 Weatherby Magnum
• 7mm WSM
• 7mm Remington SAUM
• .28 Nosler
• 7mm STW
• 7mm Rem Ultra Magnum
• .30-40 Krag
• .300 Remington SAUM
• .300 H&H
• .300 RCM
• .300 WSM
• .300 Winchester Magnum
• .300 Remington Ultra Magnum
• .300 Weatherby Magnum
• .303 British
• 8mm Remington Magnum
• .325 WSM
• .338 RCM
• .338 Winchester Magnum
• .340 Weatherby Magnum
• .338 Remington Ultra Magnum
• .350 Remington Magnum
• .375 H&H
• .375 Ruger
• .375 Remington Ultra Magnum
• .405 Winchester
• .416 Remington Magnum
• .450 Marlin
• .458 Winchester Magnum
• .480 Ruger
• .50 American Eagle
• .500 Smith & Wesson

.