I use to hold "ML Range Walks" at my local club / and we shot strictly "swinging" gongs from different distances so all you had to do was hit the gong to get the point... In a contest like this / caliber doesn't matter much as long as you know your ML, and your windage and elevation judging.
It's always fun shooting at reactive targets! And it levels the playing field for all involved.
(side note) I also used this same technique above when holding .22 Rimfire Matches at our local club... The Rimfire shooters didn't like this type of match / but us Traditional Muzzleloading Shooters - we had great fun with it!