
Originally Posted by
Frogg
to summarize, as the pertinent information seems scattered throughout this thread:
ego rating on weapon is equal to or lower than (in the case of vendor items) your ego rating at the time of acquiring the weapon. You can't use a weapon with a higher rating, so trading is limited in that respect.
higher ego ratings on weapons allow for better bonuses to start, as well as on levelling that weapon. (now that resetting weapon xp is a salvage option, there are as yet unanswered questions as to whether or not those mastery bonuses can be reset.)
if there's more to it, I haven't seen it.
(ego rating 3590 at present)