Generally it is recommended to use, at least, 50 yards for load development. But, I'll modify that a bit. Start at 25 yards from a rest to learn where your sights are pointing. If you are on paper, move back to 50 yards. Traditional wisdom is to begin with a load that equals your caliber. e.g. 50 cal./50 grains real bp. Shoot five shot groups and increase charge by 5 grains until your group closes to where you want it. As said by others, the target need not be fancy. Paper plate with a felt tip marker 'X' or targets from Walmart are just fine. Good shootin'