Back in the day I used to shoot Hunter Class using a stock Ruger BH in 357 Mag. with heavy cast handloads of FMJ's for the heavier Rams at 100 meters it was a blast. 200 meter isn't all that hard with the right setup.Target's are at 50 (Chickens), 100 (Boars), 150 (Turkeys) and 200 (Rams).
There are different classes but big bore shoot on the long range.