I have mentioned this here, before. Years ago at our local rendezvous- in 87 through 90, we had a 300 meter range up top, above the black powder range. At rendezvous, we did quite a lot of our shooting up on the rifle range and also used the trap range for smoothbores.
On the 300 meter rifle range, we had a steel plate - 24" in diameter hanging on the target rack. My .69 was undefeated on that target - didn't matter who was shooting it - as I had filed (sighted in) the 3rd leaf for that range, specifically for the 165gr. 2f charge and a tightly patched 484gr. pure lead ball. We no longer have that 300 meter range as that location has been reduced to a 200 meter berm. We do have another location range, with target butts to 100 meters and beyond, so shooting to 300 with round balls is now possible, again.
We are able to "take" shots out to 250 yards at the Hefley Creek Rendezvous with our round ball rifles, if desired. Every rendezvous, a number of us have fun with this, but it is not a scheduled event.