Questions about primer sorting

[M14AMU]

BULLSHIT GALORE!

 

[rwj]

BULLSHIT GALORE!

?

 

[Dimner]

The Indian and the arrow must be capable of shooting the difference otherwise it's an unnecessary waste of time
I sort my primers to 0.001 gram because it makes my match ammo more consistent and uniform and reduces fliers, it is a simple task but time consuming.

This is exactly it. Before a shooter takes on a new technique, the question has to be answered, "Can I shoot the difference?"

 

[drop_point]

I tried it and started breaking in my new barrel.

I noticed a range of 3.36 to 3.50 on CCI 450s with 3.45 being the largest lot. I shot 3.45s vs a random selection that wasn’t sorted and noticed an SD of 4.2 for 20 rounds for sorted vs 7 and change for I sorted. Groups were similar at 100 yards, but the best group did come from sorted at 0.1045” for five rounds. I tested a heavy assortment of primers which were 3.48-3.50 and saw double grouping at 96 degrees F. I think there is some benefit, and evidently the load was on the ragged edge with heavier primers and high temps. This is anecdotal for me at this point, had hoped to try more this week but one of my days off I was tending to a sick baby.

Once I get to 600 yards, I’ll have a better idea.

 

[Straightshooter1]

I tried it and started breaking in my new barrel.

I noticed a range of 3.36 to 3.50 on CCI 450s with 3.45 being the largest lot. I shot 3.45s vs a random selection that wasn’t sorted and noticed an SD of 4.2 for 20 rounds for sorted vs 7 and change for I sorted. Groups were similar at 100 yards, but the best group did come from sorted at 0.1045” for five rounds. I tested a heavy assortment of primers which were 3.48-3.50 and saw double grouping at 96 degrees F. I think there is some benefit, and evidently the load was on the ragged edge with heavier primers and high temps. This is anecdotal for me at this point, had hoped to try more this week but one of my days off I was tending to a sick baby.

Once I get to 600 yards, I’ll have a better idea.

Likewise, in my little test, my best group was from those that were sorted. It was for the 6 rounds that I initially fired to warm up the barrel prior to starting the test. Though my test wasn't really about group size, the groups in the test were not near as good, having significant dispersion; the test being fired in a round robin fashion between those that weighed 3.36 and 3.50.

Though your test and mine are anecdotal, there does look to be plenty other's who also have gotten similar results that supports the theory that sorting makes a difference. Whether that difference makes a difference for any particular shooter, just really depends and sorting primers may or may not be worth the effort. ¯\_(ツ)_/¯

 

[qldreloader]

Primers are both expensive and hard to get here in Australia. I sort them into two classes - fired and unfired. The unfired ones get used and reclassed.