Ammo that don't melt?

[BBstacker]

Seems the .22 ammo I leave in my PU over the summer gets hot, wax runs and then I get a small annoying percentage of duds. I'm using Federal Champions in the 550 bulk packs, which is pretty clean shooting ammo for the most part. Is there a better brand for hot weather? Has anyone had this problem?

[awp101]

You're going to have that problem with any of the wax coated ammo. The Remington bulk pack and some of the CCI stuff are all I can think of that arean't outside lubed.