I recently changed projectiles for the unobtainable Sierra to the Aussie 174 gn .312 Woodleigh flat based PP projectiles behind AR2208 and have found them to shoot to the sights on my No 1, 4 and 5 quite nicely.

The target I use is the original 25 Yard ladder test sight, with the markings from 200 to 600 yards.

Dick