Case Volume in gr. of water

**Balljoint** · 03-01-2011, 04:22 PM

Came across a Velocity Calculator on a web site i subscribe too http://ammoguide.com/cgi-bin/ai.cgi?...ferer=&curr=ai, one factor needed is the case volume in grains of water in a 308 rifle case all other factors looks like i have them.
can anyone one help me

**drybean** · 03-01-2011, 06:09 PM

weigh a empty case,then weigh that case full of water
the diff. will be volume in grns. of water
drybean

**Balljoint** · 03-01-2011, 07:22 PM

Looked on several web sites and found finally that 308 Mil cases hold 56 gr of water (general) and Factory 308 cases hold 58 gr. water (general) close enough