I just shot a 600 yard match yesterday. Each string had a possible of 200-20. Keep in mind that I was shooting along with the modern crap and F class shooters. I had the only vintage rifle on the line. I wish I had a buck for every "What is that boat oar you're shooting?"  First string I shot a 104-1. Second string was a 127-0. Not too bad for a tired rifle, tired shooter (62 yo eyes) and 1901 sights. Any way, I'm in for the postal match once you get it all hammered out.
Jon
Btw my rifle is an unaltered '98 rifle.