It doesn't, Im afraid.
I was using the Stormfire, had equipped it when it was first usable (which was around level 26-27 I think. Also had a Bloodlet in the bank which was obtained by a higher level alt, usable by my Ranger at lvl 34 I believe. At the time I put it in the bank the stats on the Bloodlet were WAY better than the Stormfire, as well they should be being usable 7 or 8 levels later on.
Finally I hit 34 and I cant wait to use my Bloodlet. I go get it from the bank and examine it. To my shock and dismay, the stats are now exactly the same as the Stormfire stats. Trying to be optomistic, I convince myself that the reason for this is probably that Stormfire has the same stats at the end of its usable level range as the Bloodlet does at the beginning (of it's). Maybe, I think, the Bloodlet damage scales as I level. So off I go with my new bow.
Last night I ding 38 and I remember to examine the bow again, to see if it has scaled. It hasn't at all, same damage as when I equipped the thing.
I must confess that I honestly don't remember the stats of either bow when I first examined them, so I'm not sure if the Stormfire became better or Bloodlet got nerfed, although my suspicion is that the latter occurred.
Still a good bow to be sure, but a bit of a disappointment that it was the same as Stormfire after waiting so long to finally use it!
Aranuir
Blackburrow server