batch number question

sniperman

hi all,if bullets are made on the same machine,in the same factory,why would a different batch number make a difference when it comes down to accuracy?for example .17hmr bullets

EPointer=Birdss

sniperman wrote: »

hi all,if bullets are made on the same machine,in the same factory,why would a different batch number make a difference when it comes down to accuracy?for example .17hmr bullets

Lot to lot variability & Regulatory requirements of their Notified Bodies or Agencies.
Unless validated & process capability proven. One batch to another could perform massively different. This can be due to dimensional variance or any number of machine/ operator issues.
Furthermore a faulty batch can be traced to the works order it was manufactured on which gives their QA department the history of when, who & what it was made from & by.
Furthermore if ISO regulated their standards would require ID & Traceability or nothing can be shipped from their plant.

It wasn't me!

Also, factories routinely experiment with materials and loads from batch to batch. I've tested .22 ammo for competition from a machine rest a few times over the last couple of years and the difference between stuff that works and stuff that doesn't makes a big mental impact when you see it for yourself. Most stuff is alrightish, some is awful, the smallest proportion is what really sings in a given rifle.