i never get more than 3% exp even if tier is 10+

whats it for?

ur just unlocky on item mod drop thats all

clarify your question?

Are you asking why you can't find anymore than +3% Exp. Gained on items? Just unlucky there bro.

Or are you asking why you don't get more than 3% of the total Exp. needed to gain a level? You get the same exp (more or less) per kill no matter what level you are.