I have been meaning to double check this for some time so I have just been out to check. The logs are about 80% beech with a snaffle (phrase on loan from TCD) of other hedgerow trees including oak, sycamore and hazel.   The only scales I have suitable are some sheep scales so first I checked their accuracy with a couple of feed sacks. For some old scales I was pretty impressed as they read exactly 50 kg.   An IBC crate was filled to 1.01 m3. Close enough for me   I put the logs through th