Hey there Woodchuk,
Brass bead front will be smaller(finer) than those on the handguns. I was also accustomed to the smaller beads found on long-guns. One thing is practice, practice, practice. Remember that with open sights on a handgun, you will not be responsibly taking shots at a distance that you would expect of a rifle. I have been popping squirrels this year, and must say that all the shots from my single six have been no farther than 25yds away. That's part of the sport of handgun hunting for small game, as it increases your woodsman skills and presents more challenge as you are stalking close, and not taking the long-range rifle shots. And yes, I can make a good headshot on a squirrel up to 30yds away with the factory Ruger sights, although I have 'touched em up' as stated in my previous article, which seems to really help in dark woods. I don't know if you have looked at any or not, but stay away from guns with fixed sights for hunting, and get one with fully adjustable sights. Just remember to sight in the handgun off of a good solid rest and determine which ammo groups well with your gun. Then, practice using whatever stance you prefer for hunting. If using different loads, there is a good chance that the sights will need to be adjusted on an individual load basis. I would give some time to the 'bulky sights', as it will take some getting use to. I don't think you'll have any problems with the factory sights, provided you put in quality time at the range. BTW, I have found it to be very challenging, rewarding, and loads of fun to hunt game with open-sighted handguns!