This probably a REALLY simple question with a really simple answer, but I can't seem to wrap my head around it.
I've managed to calculate my barrel volume using an online calculator as 12280, however there is no unit of measurement given for the answer, I'm assuming it's mm3.
My mancraft engine is apparently volume at 6500mm3. That would mean I'm horrifically under volumed, which makes no sense either as the shots are hitting a wheelie bin at 95 meters, with a little luck, most go past but the point is I've got no range issues, just a long range accuracy issue, which I'm guessing is an over volumed barrel.
I know I'm missing something, and it's probably me getting confused by unit measurements or something.
This is all for a mancraft sdik fitted to an action army t10.