New brass

[Old Navy]

80.5 in my 8 twist shot equally great with Varget and Reloader 15.

 

[tommeboy]

I would guess that when you get about 100 rds on the barrel, it will settle down and start shooting good. Just about every barrel I have had took some rds through it before it came around. Some just more than others.

 

[Dave M.]

Lapua brass needs to have a mandrel or neck sized before firing new brass. They do not do this when they are made. You will have very high neck tension and probably bent neck by shoving a bullet in without sizing it first.

Not to mention, in a box of 100 you will likely find 8-12 pieces that have bent or dinged necks.
Dave