Can you elaborate on "long range varmint matches"? Around here the short-range guys do "Varmint for Score" matches at 100 and 200 yds. These are basically firing 25 rounds over several timed intervals into bullseye-type scored targets at 100 and 200. Max possible score at each distance is 250-25X (25 hits in the 10-ring, and touching the tiny center dot gives you an X as a bonus).
Is what you're describing similar, but at longer distances? Or some form of silhouette shooting?