If it's not finished fermenting then bottling wouldn't be the most sensible thing, as it's possible that the last of the sugars are still being consumed by the yeast cells.
At least, you may get corks/stoppers being pushed out the bottles over time, at worst, you've created bottle bombs (rather dangerous/unsafe).
Finished ferments (and stuck ones for that matter) are when the ferment has given 3 consecutive identical readings over a period of a week to 10 days - if you have the starting gravity of the batch and know the yeasts alcohol tolerance, then it's a guide as to whether it's likely stuck or finished.
All very worth checking, because if there's any doubt, it would be better to re-rack it back into a fermenter of appropriate size and let it finish.
regards
fatbloke
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