Exceeding 150 -- I would recommend to use the max result for the weapon size, and then for every 10 points above 150, add +1 to the critical roll. Thus a 280 result for the broadsword would add +13 to the crit roll.
For the Long Axe (type III), that would be +15 to the crit roll (280 - 130 = 150/10 = +15)
I was just rereading RMC's ArmsLaw option about exceeding the max, and noted for the first time that there are rules for exceeding max on limited attacks, such as Medium Sized Claw Attacks. The "roll-over" rule is used based on the maximum, so if max for a weapon caps at 120, subtract 120 from the total amount and apply again on the same chart.
I think this would be applicable in the Combat Companion?
-shnar
