Shell Holder #5 is used for Calibers: 257 Weatherby Mag, 264 Win Mag, 6.5 Rem Mag, 270 Weatherby Mag, 7MM Rem Mag, 7MM Rem Ultra Mag, 7MM RSAUM, 7MM STW, 7MM Weatherby Mag, 300 H&H, 300 RCM, 300 Rem Ultra Mag, 300 RSAUM, 300 Weatherby Mag, 300 Win Mag, 308 Norma Mag, 8mm Rem Mag, 338 RCM, 338 Rem Ultra Mag, 338 Win Mag, 340 Weatherby Mag, 350 Rem Mag, 358 Norma Mag, 375 H&H, 375 Rem Ultra Mag, 375 Ruger, 416 Rem Mag, 416 Ruger, 450 Marlin, 458 Lott and 458 Win.