AMD FX 8350 + R7 260X ??Bottleneck??

Yes.
There is always a limiting factor AKA bottleneck.

CPU or GPU will depend on your games.

If your games are strategy games, sims, or mmo then your limitation might be the FX8350.
Such games are highly cpu dependent and mostly single core.

OTOH, if your games are fast action shooters, the graphics card will likely be the limiter.

A good rule of thumb is to budget 2x the cpu cost for the graphics card.

You could be guided by this toms article on the best gaming cpus for the money:
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106.html