Thread: Norma vs Lapua Brass: Pressure

Originally Posted by Tikka7mm08

Yep my memory is Lapua probably hits pressure sooner. Switching the 6.5PRC from Norma to Lapua.

Gotta ask.....why ? it looks like your load development was done and dusted ?

Originally Posted by jackson21

If you weigh the brass you'll normally find Lapua weighs heaviest so more metal= less internal volume. Norma can be very close to Lapua though, I have mixed Lapua and Norma 22.250 and load it up the same. If it was something like Hornady I'd treat as a different load as thinner more internal volume.

Better to measure H²O volume, the extraction groove cut on brass is more liable of differing weight than internal case volume. It's why a lot of sensible people don't weight sort brass.

Originally Posted by dannyb

why ? it looks like your load development was done and dusted ?

Think you answered your own question there!