With rimmed cartridges, drum magazines work very well. Each round has a spot of its own and they only commingle in the feed column. With PPS50, the stack is barely a couple of rounds tall.
Puma metal drums tend to be expensive and a bit difficult to load. BDM drums (the same basic design as their 10-22 and AR15 magazine but without tall feed towers) work rather better.
And the gun looks neat, so I usually bring it for kids to shoot. Once I have .22 tracers expected from SBR, this will only get more amusing. I was curious how CCI “tactical 22” ammo would work, so far it seems to be the bulk equivalent of Mini Mags.
Not having to use a mag loader definitely helps, as I often can’t locate mine or forget it at home.