haha it doesnt have to be EXZACT.....just ballpark.....just tryin to figure out what i need before the season is here and i go to load everything for the hunt and i have like one loading of BP left.......i want to start shooting the flinter alot and get really good with it....i want to leave the rifle on the rack this year and take the flinter.....i didnt think i could be that accurate with it...but at 40yds i had holes touching holes with patch and ball not cleaning not playing with loads....just sighting in to shoot groundhogs.......thanx alot....atleast i have a ballpark range....thats good enough for me.....