Today's experts (not me) feel it is more beneficial to sort by length of bearing surface rather than be weight. IMHO, this type of sorting is worth about 1/8 moa improvement in group size with a match-grade bullet. maybe even more improvement with other bullets that might not be built with such fine tolerances.
I'd love to hear quantified answers from other proponents.
To give a little more info - My case prep is to uniform primer pockets , debur flash holes , trim to length , after I measure chamber, and weigh to .5 and sort to batches. this I have done on all my rifles and Contenders for years but I don't turn the necks and haven't weighed my bullets - I don't think I do any more or less than most shooters and hunters .I'm not a benchrest type guy but I do like to know that I've done my best to promote a safe and clean harvest of game . need your options on this , I would include this to my reloading practices if it really helps - thanks
with what you are doing, weighing bullets would be a waste of time for hunting out to 500 yards.
Sorting to .5 gr for hunting and even BR rigs is normally very acceptable tolerances.
It is only at the longer ranges that the weight difference and more importantly the variations in ogive and metplats comes into play in trying to eliminate the vertical from an extremely accurate 1k BR or LR hunting rig.
I just recently starting turning necks for my varmint rifes (not tight-necked BR chambers). I found a few things out:
1. It is a royal pain to try to set the turner up to turn necks to a specific thickness.
2. It is very easy to set the turner up to just clean the necks up to where they will all show less than .001" variance.
3. Cleaning up the necks shows a definite improvement in seated-bullet run-outs. The reduction in loaded-round run-out is proportional to the improvement in neck uniformity.
The way I set up the turner for cleaning-up necks is this: I take a piece of brass from the lot to be turned that shows some of the worst uniformity of the bunch. I find and mark the thinnest spot on that neck, and then adjust the cutter to just touch the neck about 30 degrees to one side or the other of that spot. This usually results in cleaning-up about 75-80% of the neck on the worst ones and very little on the best, and gets uniformity down to under .001". If the necks still show more than .001" variance, I will take that same piece of "bad" brass a adjust the cutter to touch a little closer to the low spot. I repeat this until all brass cleans-up to under .001".
If anyone else has what they think is a better method, I would be interested in hearing it. I am just getting started in this neck-turning thing.