I've done it, but it's been a while.
I thought I was pretty decent with a pistol until I shot my first BP match.
AutoMag- You really should try it, and bring an AutoMag.
I used to take one of mine and shoot at least one "round" with it. I don't know why, but even though the .44 Mag revolver shooters should have had near-identical results, the AM seemed to take the pins off the table cleaner than anything. Strange thing.
My problem was- I was using a relatively light load of W296 at the time (the lowest charge that would cycle the gun) and it burned pretty poorly at the lower charge weights. The powder granules it left behind, combined with the oil, left a paste that gummed the gun up to the point Iw as getting a lot of malfunctions after three or four mags.
Otherwise, I would have shot the whole match with it.
This was about 1994 or 95, before I tried any of the powder blaster-type spray cleaner which may have made things more "workable" if I had given it a squirt and re-lube now and then.