The only problem I can see with supplying the ammo at the field is some people are really picky about what ammo goes into their guns. People know their guns and know that certain brands of BBs won't work well with their gear. In my case, unless it's BB Bastard or Metal Tech, I now refuse to use them in my guns. If those 2 choices aren't available, I won't play. No offense intended because I know you're a reseller of VA / KSC BBs, BlackRain, but every time I use those things, I'm stuck taking my guns and / or mags apart to pick smashed or jammed BBs out of them, and as a result, I refuse to use them. And others feel the same about these or other brands of BBs. So supplying with a single brand might be an issue with some players.