long range target question?

Hi all,

I've been playing with the 'ten dot' 100yd/meter thing but that will be over soon; am trying to find me a longer place to sling some lead...
? what is a 'normal' established target for 400 to 1000 yds. where does one obtain them? I can get 400 meters easily but beyond that is proving difficult for sure.
am saving up for a new range finder as well as am hoping to do some REAL load development this winter out here; it is getting HOT!