25WSM
Well-Known Member
I have done some extensive testing on this myself. Since I shoot 1000 yard BR es/sd is very important to me. So a friend of mine that shot f-class and has a 20 ft long wall of first place and championship winning wood on it told me to shoot every brass and record the speed and sort your brass that way. He said weighing brass does absolutely nothing. I came to the same conclusion. I took the heaviest brass I found and the lightest and loaded them identical. Shot through my 35p and found that most of the brass at the extremes of weight varience shot within a few fps of each other. Also the load I used for these test shot es of 4 and SD of 10. Very consistent load so I know the load wasn't going to cause speed variables. So basically I found weight sorting to be nothing but a waste of time. I also took my velocity chart of 100 shots and weighed the brass from the slowest shots to the fastest and found the brass that produced those numbers were in the zone of the average weight of cases. I now only sort my brass by velocity once I find a low es load. I also did testing of primer weights. I found that the heaviest and lightest primers in a box of 100 produced speeds within the es of the load I was using. I don't weigh primers anymore either.
The problem with the ops test was he was using a load that he knew had a bad sd. That will really skew the results. I suggest you do the test again with a load that has low es numbers.
Or don't. I know from my test after velocity testing over 1000 pieces of brass that weight of brass does not correlate to velocity. These are my observations from test I've personally done myself and I'm a results driven reloader. To the op again. I've done multiple test on putting lubes inside necks on brass. I have found that the carbon from firing left in neck and just brushed produced the lowest es. I struggled for 2 months trying to get my guns to shoot when I started cleaning my brass with pins. I then shot some older brass that had not been cleaned and my accuracy was back. Results. No more cleaning my brass. Just a quick wipedown on the surface with a rag and done. Had to decide do I want to win or have shiney brass. Easy choice.
Shep
The problem with the ops test was he was using a load that he knew had a bad sd. That will really skew the results. I suggest you do the test again with a load that has low es numbers.
Or don't. I know from my test after velocity testing over 1000 pieces of brass that weight of brass does not correlate to velocity. These are my observations from test I've personally done myself and I'm a results driven reloader. To the op again. I've done multiple test on putting lubes inside necks on brass. I have found that the carbon from firing left in neck and just brushed produced the lowest es. I struggled for 2 months trying to get my guns to shoot when I started cleaning my brass with pins. I then shot some older brass that had not been cleaned and my accuracy was back. Results. No more cleaning my brass. Just a quick wipedown on the surface with a rag and done. Had to decide do I want to win or have shiney brass. Easy choice.
Shep