line rating Shimano Aero Cast 13ft match

line rating Shimano Aero Cast 13ft match
can anyone tell me the line rating for my Shimano Aero Cast 13ft match rod
the only info on the rod is cast 15g and length
my reel is a shimano aernos 2500 fa reel which can line from 2-10lbs
one of the spools is loaded with 3lbs the other spool I'm thinking of putting 6lbs on
for float fishing. for Chub/Bream/Tench or am I going over the top with the 6lbs line

I have regularly used mainlines up to 6lb with mine without incident. However, I doubt I've ever used a hooklink exceeding 4lb, usually no more than 3lb. Treat it like a standard old style match rod and you should be fine. Shimano rarely give line ratings for their rods. Where you do see them stated, it's usually the retailer that assigns them.