Worn on the belt, the RM-20 keeps twenty rounds at the hunter's fingertips. With each cartridge fitting projectile down, into its own recess, ammo is always ready for easy removal. The calibers listed will provide bullet tip protection with very little rattle; however, calibers not listed will fit loosely: .219 Zip., 22-250, .220 Rus., .220 Swift, .243 Win., .300 Sav., 303 Brit., 308 Win., .35 Rem., 38-40, 38-55, 401 Win SL., 44-40, 257 Rob., 6.5 x50 Jap.