Thats a really nice buck 40SW. You should do pretty well and there arent usually that many entries in the pistol catagory.
90 yards is a looooong poke with a 40. No offense to your gun as the 40 is a nice round, but after having shot a couple dozen car hit deer in the past few years with mine at work, I cant believe the DNR even allows it as a deer hunting cartridge. They sure dont seem to be in any hurry to die after taking a shot, or several, in the chest or head. And that is at a couple paces much less 90 yards. No wonder yours took a few rounds. The .44 mag would make a much better hunting round, albeit much heavier to carry in general.
Again, not trying to rag on your gun, I was pretty surprised at the .40's lack of effectiveness too.