An FX-8300 is likely (but not guaranteed) to be a low leaker, which means it might not OC as well as another chip would. The 8300 is very similar to an 8370e, in that it runs at a fairly low stock frequency (3.3 GHz) to meet a 95W TDP, but has a comparatively high 4.2 GHz turbo speed (an 8370e is 3.3/4.3 and costs a ton more, and may or may not be worth it).
If the chip's leakage characteristics don't hold it back, I would imagine it would behave the same as the vast majority of FX-83x0's I've seen, including the one I owned. In 2013, I reached 4.85 GHz on an 8350, using a Giga 970A-UD3 ver 1.2 at a multiplier of 21 and a reference clock (it's not an FSB...) of 231. It took 1.51v (1.485 effective) to reach those settings and be stable. The chip could boot as high as 5.1 GHz with 1.62v, but I was using air cooling and anything beyond the 4.85 GHz was iffy at the vcore settings I had to use. The heat was just too much, even for a dual-tower, dual-fan air cooler. A newer 8350 would likely have no trouble making it to 5 GHz on the setup I used, but FX chips in 2013 didn't speed-bin as well as they do now. 4.85 on air with an 8350 at that time was doing very well.
Anyway, in my experience, the best overclocks on FX happen when you use both the reference clock and the multiplier. Some combinations just work better than others. My 8350 was perfectly stable at 21*231 with 1.485v, but couldn't even boot at 24*200 with 1.5, even though that was a lower clock speed. To get 5 GHz on that chip without using both was impossible, but very easily done if you did. Several other people had the same experiences, although pushing the reference clock past the 235-238 range usually resulted in failure (some people did better, YMMV, but most crapped out before 240). Phenom II's could run on much higher ref clocks than FX does.
It's kind of a crapshoot, like all overclocking. You'll need to use trial and error to figure out what it will do, especially with 8300's and 8310's. Some of them are low leakers that don't OC well, and others have normal leakage characteristics but reach high frequencies on low voltage--golden chips, in other words.