You can hit really well out to 100 easy and I can to 200 with that huge hole if you trust yourself.
I prefer smaller. The smaller holes are not really good enough for the MR31 target mentioned if shooting paper. There you need hooded and small. But no one shoots paper much anymore in matches like that with irons. I forget rear ap sizes a bit. thinking we were around 042 for the rear with a hood. Could be mistaken
An adjustable iris rear sight is better, something like the Merit that is on my Colt, but the small aperture works alright for most people. So Jeff, when you shot your targets in the black rifle challenge, you were using the big aperture for the MR31 target? The smaller aperture is more precise..