I never actually realised this but you can apply tags and colours to mags that persist in the raid UI. Whilst probably not as useful this late in the wipe with the abundance of good ammo, when the wipe resets I will deffo take advantage of my new found technique, I'm aware that it probably existed since forever but I didn't think about it and never saw it mentioned.
I bring 2 mags with best in slot ammo and 2 mags for scav stomping with cheap high flesh damage ammo. When running through highly populated scav areas, hold R and flick the mouse wheel and choose the labelled mag for fighting scavs. Then when you leave that area or it's quiet and all scavs are dead, switch to high tier again. When you are done, top up each identified mag with the associated ammo from your "hidden poop pouch"
It's going to save a lot of precious ammo in the early wipe when doing those scav tasks.
