Does this mean damage for each weapon has been increased/decreased?
Also, anyplace I can find a damage calculator for the weapons?

Yeah the weapons balance has been tweaked, the new version balance is fantastic! Anyhow in your soldat folder there should be a notepad file that has all the weapon values, you can even modify them if you like.

this file is weapons.ini for those who would like to try tweaking, If I remember correctly.

Not just power wise have they been tweaked, reload time, bullet speed, bullet power, and spray have also been affected