The blocks are CNC milled from a solid billit of 6061-T6 aluminum to tight tolerances for a close fit to specific cartridges, unlike the common one-size-fits-all plastic blocks. The blocks are made in three sizes to fit most common rifle head sizes, and will hold 50 rounds. Blocks come with stick-on rubber non-slip feet to keep them from sliding on your bench.
.565″ hole size – fits: 223 WSSM, 243 WSSM, 25 WSSM, 257 Wea Mag, 264 Win Mag, 270 WSM, 270 Wea Mag, 7mm Rem Mag, 7mm Wea Mag, 7mm WSM, 7mm Rem SAUM, 7mm STW, 7mm Rem Ultra Mag, 300 H&H Mag, 300 Rem SAUM, 300 WSM, 300 Win Mag, 300 Rem Ultra Mag, 300 Wea Mag, 8mm Rem Mag, 325 WSM, 338 Win Mag, 340 Wea Mag, 338 Rem Ultra Mag, 375 H&H Mag, 375 Ruger, 375 Rem Ultra Mag, 416 Rem Mag, 450 Marlin, 458 Win Mag.
