I’m not familiar with a Bronco Bass but I believe they are a 30" scale length?? If so then the length of string is important you would want “short scale” type
If I’m measuring correctly, it is 31” from the ball end to the nut. I think that should work. I’ll see if they have these in stock at my local music store. If not, I know they have D’Addario ECB81S.
Either way, “ball end to silk” was the phrase/concept I needed to google, and now that i understand that, I’m more informed! So thank you!