That depends on a lot of stuff...the stickier the weed, the slower it'll burn when it's rolled...if it's dry or shaky, it doesn't matter how good you roll, it'll burn pretty quick...generally you don't want a blunt paper to be completely dry when you get ready to burn it, let it still be just a little moist....and roll kinda tight but not so tight that the blunt won't burn...cigarettes burn slower when they're packed tighter, same for weed...but you gotta leave some air space in there...hope this helps...blunts can be tricky...