MTM LT-50-43 Compact Universal Loading Tray (Light Gray) Accommodates most traditional cases sold in the US Each side is for a different caliber Compact for tight loading benches Rifle Calibers: 222, 223, 22-250, 270, 308, 30-06, 375 H&H, 264, 30-30 traditional sized cases Handgun Calibers: 32, 38, 380, 41, 44, 45; It will NOT hold the newer rounds like the WSM, WSSM, Rem Ultra Mags and the 500 S&W Mag.