Thread: 223 Lapua brass

Originally Posted by grandpamac

Lapua brass is much heavier than most US brass so has less capacity. I would work up towards the listed velocity which is likely to be reached with less powder. Case capacity could be an issue as well.
GPM.

Overall weight is a poor measure of internal capacity. I cant find (be bothered looking) my old data but a quick check this morning on only a single case of each

.................................................. ................Lapua .........ADI.........Hornady...............OSA

Dry weight (grns) .........................................98.8..... .......99.7.........96.7...................94.2


Capacity in grains of water..............................30.4........... .30.2..........30.2..................30.9