Size of Target Bullseye at 50 and 100 yards?

I recently had my Gunsmith install a Lyman 1A-SA Combination Tang Sight on my 1941 Savage 99. I shot it at 25 yards and my aiming point was a one inch dark colored circle. I plan on shooting it at 50 and then 100 yards the next time I go to the range. I am hoping to find a 2 to 2 and 1/2 inch dark colored circle for the 50 yard target and then a 5 inch dark colored circle for the 100 yard target. The ballistics for my load (150grain 300 Savage Hornady Superperformance) shows a 1/4 high point of impact at 50 yards and then dead on at 100 yards. I hope to be able to see the larger aiming points at the extended distances.

For those of you who shoot with open sights, do you have any difficulty getting a good solid sight picture at these distances?

I would use 0ne moa X's. Aim small miss small.

I found this article to be very informative:

http://ataleoftwothirties.com/?page_id=502

IMO, any long range iron sights deserve lots of trigger time to overcome the over-thinking, especially if your brain has been spoiled by magnification.

Thanks. Just what I was looking for.