First post since joining this forum, but I just did an experiment on these factory 2nd 77’s from midway. Figured I’d share my results:
I measured the overall length of the bullets and saw the expected large variation in length. These are mostly taken as random pulls taken in sequence, but I did add a few more to include the more extreme examples of short and long.
Next, I loaded these into 50 new brass cases, cci primers, and the same load of Winchester staball match. I loaded 2 sets of 10 that were sorted to within .005” of each other in length, 2 sets of 10 that were unsorted and contained the full amount of length variation, and one last group of 10 that were selected on the lower 1/2 of variation (all bullets that measure under a half way point of the variation).
I shot these at 100 yards out of a WOA 20” rifle with scope over the bags as 10 shot groups. I haven’t done any detailed statistics on this, but I don’t think that there would be a significant difference between any hypothesis like sorted bullets are more accurate than unsorted. (And I don’t want to spend more time measuring / sorting to increase sample size).
Going forward, I think I’ll lock my calipers at the average length and use that to sort bullets into 2 groups. This won’t hurt accuracy at least, and makes the COL more consistent since I am magazine loading these.
If I start shooting longer range or become a better shot I will repeat since I bought A LOT of these factory 2nd bullets…