Every wonder that question? It looks like a few people have reading this thread.
Level bonus = (level - 25 / 2)
Max damage = (weapon skill + strength / 100) x (weapon damage + level bonus)
My 24 War example (35 + 146 / 100) x (28 + 0) = 50.68 damage. 51 is what he max hits for also.
This has worked for me with all my weapons, critical hits and crippiling blows excluded.