I have advertised a number of 0.44 MTM Casegard 50 round boxes and tumbled cleaned 0.44 Mag cases in the Firearms for sale section.
These are also available by post at an extra £2.90 for a weight of up to 2 kilograms if required.
100 cases in 2 Casegard boxes weigh just under 1 kilograms.
Regards
HM