I am a newby and recently bought an RCBS Rock Chucker Supreme kit. I load .380, 9mm and .45 acp. The Uniflow powder measure appears to be outfitted with the large metering screw assembly. My question is: is it worth spending more to get the small assembly for more accuracy? I usually meter less than 6 grains of powder. I check it with a scale and the amounts appear to be consistant with very little variation--yet I have read the smaller assembly is more accurate than the large. Is the difference significant? Your thoughts and observations are appreciated.