Many SASS matches have long distance side matches. I really enjoy shooting these. I ran the LD side match at Reconing on the Rock at the Beloit Rifle Club last season. We had a row of shooters shooting at 100 yd, 200 yd and 300 yd targets. I came in 2nd and got paper. .
The Remington Rolling Block 45-70 started out it's life as a .43 Spanish and was restored and re-barreled to 45-70. It could easily have been reamed out to 45-90 or more but I went with the 45-70 because of brass availability and brass cost. Also, dies are easy to come by for the 45-70.
The bullets I load are the Big LubeŽ 45-70 500 semi spitzer twin lube grove design. They haul so much lube that the fouling stays soft and blows out with each following shot. I never clean till after the match. You can see this bullet here. . . http://www.biglube.com/BulletMolds.aspx?ItemID=ee9296e2-2e6e-4f1c-b5cf-53935ced106c
I do use a Malcolm scope with external adjustments because of my eyes. So far, no one has complained.