I use ammo cans from MTM.
I've had zero issues carrying either of my MTM cans (mine do have locking tabs btw). They are always full of 200-220 grain Blackout but the plastic holds up just fine.I've got one of those, too... they are pretty decent for what they are, but I would caution anyone against really swinging one around with 15 loaded mags in it. The only thing holding it shut are the 2 plastic clips, and they are not that robust. I really wish they would have used some sort of lockdown latch, similar to an ammo can.
Be aware, however... something like 15 loaded mags, or 450 rounds... is quite heavy. Having one giant container packed with loaded mags is, in my opinion, not a wise choice. Ease of portability and storage are factors I considered. Sure, I use my 15 mag MTM box, but I also use smaller plastic 'ammo cans' like those found at Harbor Freight and elsewhere. Much easier to move and transport, not quite as conspicuous as a big ammo can. Just my .02 worth.
I've had zero issues carrying either of my MTM cans (mine do have locking tabs btw).
For something to CARRY mags to the range or other applications, these surplus MOLLE bandoliers are handy.
that hideous ACU we used for a few years
They'll hold 3 PMAGs, baseplates are too large to double stack them. Hell, when new they'll barely hold 6 metal mags. Super tight.I keep all of my magazines in 2 very disorganized rubber made bins- 1 for rifles, 1 for pistols. When I am going to go to the range, I dump them on the floor of the shed, and pick out the ones I am going to use. View attachment 1094982
For something to CARRY mags to the range or other applications, these surplus MOLLE bandoliers are handy. They hold 6, but I can't remember if PMAGS fit in them or not- I know the HK mags don't. They can be had in this older BDU camo, that hideous ACU we used for a few years, or the new multicam pattern, for about $15. Probably less for the ACU since everyone hates it. We used these when I was in the mil- we would strategically place them in different spots inside of the vehicle, so it was an instant plus-up/restock of your ammo you carried on your kit.
I know you haven't asked for alternatives, but I'd recommend an ammo can. Comes with a handle and is undoubtedly waterproof. A standard .50 will hold 17 mags while a fat fifty will supposedly hold 30 metal mags and 28 PMAGs. Looks a little militant if you're trying to be low key, though.