Trying something new, for me, that in all my years of loading I have never tried. Never really needed to, but thought it was time I gave it a shot to see if it helped accuracy. These are essentially newby questions, but like I said, I just never bothered with it before, so now it's kinda to see what difference it makes.

So, when I was sorting some 243 brass, (Rem) I was getting weights that varied by as much as 4.5gr on the extreme. I sorted them into "close" groups, within 1gr of each other, ie. xx2.8 along with xx2.4, and xx2.6. Are those the parameters most usually go by, or how close DO YOU sort them by?

Also, if I sort by weight, does brand matter? Seems to me if weights were all similar, brand SHOULDN'T make a lot of difference. I know tolerances of the neck can make some difference, but how much does that vary by brand?