Lot Numbers

[VLNBYR]

Many a rimfire horse has been beaten to death only to find new life in the future.

 

[dutch14]

There are no good, easy, reliable, and quick ways to tell if lot a is better than lot b.

 

[CharlieNC]

Problems with depth perception and analysis paralysis often inhibit progress..... QED

 

[Hi-NV Shooter]

A set of data consisting of only 20 shots will never allow you to be at a 100% confidence level, at making a decision, that one lot of ammo is better than another.
The major benefit of testing at Lapua is that it allows you access to ammo that’s currently hard to find and increases the odds that the lot you select “might” be a good one for your rifle.
With the limited data, you pick the lot you believe shoots best, but statistically many of the better lots shot are nearly equal. With more rounds shot, you could find one of those lots is better than the one you chose.
Great discussion, but at some point, I think we start beating the horse to death.

What you need to do as each lot is tested is watch how the 10-shots forms the final group shots 1-5 is critical as to an indication as to how that lot will fare on say an ARA UL target.
for any lot to shoot a zero group 0.000 all in the same hole the rifle will need to be perfectly in the same position for every shot. only then will you see the true performance factors of that lot. but we all know that is highly unlikely for that to happen. because now the barrel is also another factor that comes into play.

so, what we see in a 10-shot or 20 shot test string is only what the rifle will allow it is not a true test of the lot quality. this why the statement form Shane at Lapua is true somewhere down the line someone's rifle will shoot what someone rejected and may be the killer lot for them.

Lee