Can I ask an obvious question?
WHY a steel shaft?
Hmm, about 8-9 years ago, I tried a bunch of graphite shafts, since I used to build clubs as sort of like a hobby. The distance was fine, but I wasn't able to control the accuracy as much as I'd like. My misses were always a weak high fade and struggled hitting a draw. My golf instructor at the time suggest I try building a steel shafted driver. I did and that club has been in my bag ever since. Its a Snake Eyes head, DG R300 shaft at 43.5", D3.5. I hit that thing more flush that I'd ever had with any other driver. I lost about at most 10 yds off the carry, but gained so much in accuracy and ability to control my shots, like a nice draw when I wanted to which in roll makes up for the distance lost in carry.
I average about 260-270 carry, nothing crazy but still, even if going to steel made my driver carry to say 245, I'll still choose steel because of the accuracy it gives me.
I'm not saying steel shafts are more accurate than graphite shafts, but for me, I think its the overall weight of the club and shorter length with steel that keeps my swing more consistent. The weight of it when loading the shaft also keeps me from overswinging or opening my hips too early. It slows it down just enough for me to torque my hips and uncork a little bit later.
But now that head is starting to show fatique, (the face isn't as hot anymore) with some minor flat spots showing on the face, I dread having to retire that thing.