You should also know what rate of twist your rifling has. If it is 1:48 or slower then a patched round ball should give good accuracy. If it has a faster rate of twist like 1;32 or 1;28 then the patched round ball will not work so well unless you greatly reduce the powder charge. The patched round ball (PRB) if shot through the faster twist will not grip the rifling and slip or as it is called strip down the barrel and will result in terrible accuracy. I agree with Cayugad on the wad under the bullet I got better accuracy in every rifle I tried it in.