Tried them in my ROA,s and a Rodgers and found them not worth the effort. Harder to cast than round ball. Fiddly to load due to a flat bottom instead of being round.
I found they shot 4" higher and were no more accurate so went back to round ball. How ever if you spent time experimenting with loads you may well find an advantage
possibly over longer distances. I shoot at 20 and 25 yds so not worth it for me. Tim