The cleanest burning, but most expensive are the Vitavorhi's (sp). But with lead bullets you're always going to create a cloud of "smoke". Several indoor competitions now prohibit lead bullets, because of the lead "spray". Not the impact cause spare, but the lead smoke that comes out the barrel.
I went to VV to try and minimize the "cloud" but finally had to accept that lead will always be smokey. Moved to copper plated for 9mm and .45, and true jacketed for .44 and .357. My smoke cloud went away after that.