Magnetic pickups are designed to work with steel strings. Bronze strings will loose 2/3rds or more of the volume compared to steel strings. The nylon core of the TIs means they won't work at all with a magnetic pickup.
The process of coming to a conclusion is vastly more important than the conclusion itself.
The Sam Ash by me has a MIA Fender jazz with bronze strings. I asked the guy and he was like "yeah, they're like these gold strings, they're good for like...the sound..." and then he kinda trailed off and slowly walked away.