Brass

[BD1]

    I use this same method every time. Sitting at a table I check weight the digital scale then weigh each case individually and line them up in rows. My goal is to come up with 50 cases out of 100 that are all within +/- .2 grains. Those are my match cases and I'll take the row with the most cases weighing the same and add to that from the next row until I have the 35 I need "for Score". The others from that 50 being sighters. The numbers can very depending on the structure of the match.  A typical distribution in my experience has one row that has the most matching cases, then a row either side of it with slightly fewer matching weights, and as you go out from the center the rows get shorter. Cheap brass distribution looks like a Christmas tree. High end brass distribution looks more like a Arbor Vitea tree, Like the pic I mocked up attached which is what a typical Lapua distribution has generally looked like. Using my method, (which I admit is mine alone, but it has worked for me so far), with this lot of starline 6ARC brass I have two choices, either taking the row at 11.4 grains with the rows to either side, (111.2 and 111.6 for a total of 41 cases, or taking the row at 112 grains with the rows on either side, (11.8 and 112.2), for a total of 40 cases.  I've just never seen this distribution in a single lot of brass before.
The percent range of weight is not a large number, in fact it's about what I'm used to seeing, and without the few outliers it's not something that would be very significant at 100 yards. But these are pretty small cases compared to 6.5x55 or a .308, and my goals for this rifle involve longer ranges. I guess I was expecting a more narrow range.