Wood Reloading Blocks The Large Caliber block will work with a case up to .570 dia. The Small Caliber block will work for a case up to .470 dia. The blocks are 4.5 inches wide x 9 inches in length. Thickness is 3/4 inch with the cartridge holes 1/2 inch deep and has room for 55 cartridges. $14.50 per reloading block includes shipping. USPS Money Order or PayPal.