i seen a guy using 15lb braid for shiners,whats the deal with that? i never used braid for live bait i use mono most of the time what's the deal with that?

First question is, did he catch anything?  

Second is...no, more of a statement. I suppose
if it works, use it. 15# braid is the diameter equal
to 4# mono, so consider that, too.

Like you, I also use mono or copoly line for live
bait fishing as opposed to straight braid.

Just last week, we were shiner fishin in florida. We used rods with both. There was no difference at all, bait was back 50 to 60 ft from the boat. We caught alot of fish in 10 to 16 ft water.

 

Yeah bass usually aren't line shy if it's something REAL on the hook

I use 20lb braid to free line live shad during the winter, mainly for wipers but I catch plenty of bass too. 

I use braid on all my ice fishing tip-ups and never seem to have an issue with that.

I finally tried the Fenwick Iron Thread 10 lb. braid. I've been fishing off a boat dock in south central Florida. Quarry is largemouth and bait is live shiners. There are a couple of weed beds a looong cast from the dock. Get a 6" shiner close and hold on, but hookups with stren were poor-too much stretch and they are gone on the first jump unless they swallowed bait. Went to the iron thread and did find a bit of a learning curve. Spool says 10lb, but it is MUCH stronger. Occasional wrap around rod tip. Really need to watch bail closure, so old Swedish Cardinal will have to go. Long casts are easier and hook sets are deep and immediate using a 2 ought hook. Landing % now about 80%. After landing a big bass 24" long I did find line had cut into itself on the spool and needed to be pulled out by hand and rewound. I'm really impressed, since there is no line stretch but, there is no room for error when fighting a big fish. Just my take.