Thread: margin of error for powder weights

i have just started to reload my own rounds for my .243, i have found that measuring weight each load individually is taking me ages as my powder measure isnt the best, i have it set for 40gr but itl give me 39.9-40.2 grains. So should i be worrying about the variation in each pour? will it make that much of a difference to how the bullet shoots etc or should i keep adjusting them as i am until i get better gear? i will be using the rounds for long range varmanting, deer hunting and targets (iv got a couple of .243s). thanks.