They seem like a good quality product until the first time you drop one loaded with loose ammunition onto a concrete floor or concrete slab such as at the shooting range.
The good news is all of the exercise bending over picking up loose rounds scattered all over the ground is good for your heart.
30 caliber metal USGI surplus can will hold 1,000 loose rounds of 9mm and 20 25 round boxes (500 rounds) of 9mm which is really all of the weight I like to carry up the stairs from the man cave and load in the truck for a range trip.
50 caliber USGI ammo cans are useful for packing miscellaneous gear to the range and for long term storage in the mancave.
I usually buy a couple of ammo cans a couple times a year at gunshows. Last gunshow I paid $9.00 for a new 30 caliber and $10.00 for a 50 caliber in excellent condition.